"Computers may be twice as fast as they were in 1973, but the average voter is as drunk and stupid as ever. The only one who's changed is me. I've become more bitter and, let's face it, crazy over the years. And when I'm swept into office, I'll sell our children's organs to zoos for meat, and I'll go into people's houses at night and wreck up the place!Woahahahahaha!!"
In Fullmetal Alchemist, Fuhrer King Bradley is a homunculus. When Colonel Roy Mustang tries to expose him to top military brass, he gets a shocker: most of them were already in on it. The entire country of Amestris was founded by Father and the homunculi. Bradley was a human chosen to be the country's ruler and injected with the Philosopher's Stone to make him a homunculus.
In Steel Ball Run (Part 7 of JoJo's Bizarre Adventure) the president, Funny Valentine (yes, that is his name), is a corrupt, morally devoid lunatic who somehow still manages to be a Villain with Good Publicity (probably the American flag scar). Among other things, he uses government funds to secretly hire criminals and lackeys for his dirty work and he obviously has some sort of plan for ultimate power that involves using said lackeys to get "Saint Parts" for him. Oh, and he tried to rape a 14 year-old girl in one scene. He wasn't sure she was 14 years-old, but attempted none the less.
His skills as a politician and a speaker can't be denied though. He even managed to momentarily convince the main character of the justness of his cause.
In Bloody Monday (Season Two) President Adams seems to do this, only he's just more of a Jerkass than someone that's genuinely evil.
It's actually more of a multi-arc crossover — he remains president for several years, and becomes more involved in the rest of the DC continuity (for example, framing Bruce Wayne for murder in a lengthy arc in that comic). Surprisingly, though, he's not any more evil than usual; he's no more corrupt or power mad than when he was a regular Corrupt Corporate Executive. The only time he really snaps is a relatively short arc in Superman/Batman where he tries to frame Superman for a Kryptonite comet heading to Earth, and then loses it — this is what gets him impeached. Going on a killing spree with your old Apokoliptian powersuit will do that.
Subverted in Superman: Red Son, after Luthor had succeeded in killing Superman(not really), he becomes the new US President, and succeeds in creating a golden age for the world.
Doctor Doom, archenemy of the Fantastic Four, is probably the best-known, ruling Latveria, an archetypical Ruritania. He's been deposed a couple times, but always manages to get back in.
In the 2099 series of comics, Doctor Doom became President Evil when he managed to become President of the United States. Though in that series, he was the HERO compared to the soulless evil corporations he was fighting.
And he was succeeded by a President who was worse than the corporations. For added irony, this drug-addicted psychopath claimed to be Steve Rogers.
Though whether he's actually an evil ruler and not just a ruler who happens to be evil changes from time to time, and depending on the incarnation. In some versions he's generally a very good ruler, bringing his country peace and technological advancements, where the people are truly happy. In others it's basically a Police State where Happiness Is Mandatory. Granted, one that actually works still a step up from the corrupt, brutal, crapsack Police State it was before Doom cleaned it up.
Technically he's the King of Latveria not the President. He still becomes President of the United States though.
In the Wolverine Bad Future story Old Man Logan , the Marvel villains have taken over and Red Skull is the President. (Though technically he only rules a fourth of America, with three other major villains each having their share.)
Magneto, archenemy of the X-Men, ruled the island of Genosha for a while, transforming it into a haven for mutants, until it was destroyed by Cassandra Nova.
It's worth noting that, unlike most of Doctor Doom's enemies, the X-Men have never paid much attention to international boundaries or legitimate governments, and when Magneto headed back towards the crazy end of his personal sanity scale they didn't hesitate to invade the country, attack him in his capital and stab him to near-death.
From Bad to Worse in House of M: Ruling from Genosha, Magneto's power extended over most of the world, though he allowed his dubious allies (such as a Starscream wannabe Dr. Doom and friggin' Apocalypse) to keep control over their own little corners. He was actually a fine ruler to that reality's mutant majority, though the humans weren't as lucky.
In Promethea, several hundred howling demons possess the mayor of New York, a highly ineffectual man with a Split Personality or forty. The net result is that the demons displace the personalities and go on to create a popular series of public works (including legalizing devil worship and pentagram shaped buildings), which actually raises his approval rating.
"'All shall kiss my smouldering hoof', said the Mayor in a statement yesterday."
"Minority groups cheered the Mayor's statement that he would bring 'A new era of blackness' to the city..."
Philip Nolan Voigt in Marvel's The New Universe, a paranormal who can duplicate any other paranormal's powers, only better, uses his abilities to become President. note Sound familiar? Also, Voigt tries to intimidate an Intrepid Reporter by threatening his elderly mother.
Black Adam as the leader of Khandaq, though that all came crashing down in 52.
During the '80s, when tensions with Iran were still high after the hostage crisis, the Joker from Batman, who'd just killed Jason Todd in Africa, was chosen to serve as Iran's UN representative, thus giving him diplomatic immunity. I'll repeat that: Iran made The Joker a diplomat. This was later retconned so that it was Qurac, a (fictitious) terrorist state, that gave The Joker diplomatic immunity.
And then they did it again in the early 2000s, as part of a plot to nuke New York City.
Transmetropolitan: Spider's problems get a whole lot worse once The Smiler becomes president. The Secret Service stalks his filthy assistants, assassins start crawling up his butt, and his stories get killed for reasons of "national security." He's able to give as good as he gets...
The Beast, his predecessor, isn't much better. He is, by all accounts, a venal, selfish bastard, and the main reason he's called "the Beast" is because Spider nicknamed him that and it stuck (to the point that even the guy's kids call him that). However, despite being a prime President Corrupt he's ultimately shown to be an aversion of this trope: The Beast never goes after Jerusalem personally (unlike The Smiler) and is show to have political beliefs — they're just horribly lazy and selfish ones that essentially boils down to "if more than half of the people in the U.S. have a roof over their head and a meal, I've done my job."
Around the time of the Watergate scandal, Captain America discovered that the head of the terrorist organization known as the Secret Empire was in fact "a high-ranking government official" (i.e. President Nixon). He was sufficiently horrified by this that he temporarily abandoned the Captain America identity, calling himself "Nomad". It's not clear what Nixon was supposed to have meant to accomplish by running a conspiracy to take over the U.S.A.
During an arc on Geoff Johns' Avengers run, America got a Secretary of Defense called DellRusk The Red Skull, yes that's an anagram. Who gassed large parts of the country with the Crimson Mist virus.
Dell Rusk led to quite a bit of Fan Dumb and/or Unfortunate Implications because the story ran around 2003 or 2004 and he shared the same initials as the actual Secretary of Defense at the time, Donald Rumsfeld, but come on, it really is an anagram for "red skull", so there's not much else they could have used. "Led Lurks", perhaps.
Also a factual mistake. A cabinet officer of any position, nevermind DOD, is vetted by the press, and subject to huge scrutiny, often by members of the President's own party. The storyline indicated that no one knew much about 'Dell Rusk', and no one even gets to be discussed for nomination without getting their x-rays x-rayed. It would be easier for DR to have gotten in as VP, because the POTUS nominee alone chooses that. Even allowing for comics' corruption and government, the system would have to be hentai-level compromised for DR to get in as Defense Secretary.
President Leland McCauley in Legion of Super-Heroes (postboot version) turned out to be immortal supervillain Ra's Al Ghul in disguise.
The atomic war that originated the Judge Dredd mythos came around because President "Bad" Bob Booth stole an election, went around seizing the resources of foreign countries, and then openly announced he was going to start nuclear war with everyone if they didn't shut up. And then started it. (In "fairness", he thought America's nuclear screens would keep it safe from retaliation. They didn't.)
The Judges took over America and have since had one active supervillain for a Chief Judge (Cal), one who gained dementia and began some horrific policies (McGruder), and currently one who is a puppet for Shady Interests (Francisco); every other Chief Judge has carried out some morally questionable acts in the name of protecting Mega-City One, from foreign regime changes (Hershey) to deliberately starting a riot so they could have an excuse to beat up on a pro-democracy march (Silver).
The office of Mayor of Mega-City One isn't exempt from evil either, with examples including a greedy, gluttonous wannabe-king (Amalfi), and an unrepentant serial killer (PJ Maybe).
The leader(s) of Bialya, a fictional country in the DC Universe. Always some kind of homicidal whackjob who got the position by offing the previous leader. Oddly, this doesn't seem to have stopped even after Black Adam kills most Bialyans.
The Authority. The President of the U.S. even confesses to being a shill for big business. The Authority, who has had a long history of taking down dictators, depose him. Things go okay for a while, until The Midnighter figures out it's all heading south and fast. Unfortunately, the only way to stop it is to let D.C. explode. Boom.
Mark Waid's Empire details what happens when a Doctor Doom-esque villain actually succeeds in taking over the planet.
Norman Osborn managed to become (de facto) President of the U.S. in the Earth X series, after the Absorbing Man destroyed Washington, D.C. Although strictly speaking, his title was illegal—he simply assumed power without an election—most people were willing to go along with it rather than starve. Curiously, he does relatively little harm before the mind-controlling Skull usurps power and kills him.
Now Osborn is considered a criminal by the general public once again following the Siege.
In the Marvel 1602 series, we see a brief shot of the modern world, where second-string supervillain the Purple Man has been elected President of the United States of America (presumably using his mind control powers).
In Elektra: Assassin, the Beast manages to get Ken Wind elected president, but Elektra thwarts the plan with her psychic powers and ninja skills.
Monster Plus has World President Mark Darke, who, if the name isn't helping you get it, authorized the creation of EVLI Eye squadrons to handle dissidents.
In Zombo, Donald Trump is president of Earth, and when he isn't an unholy spawn of George Bush and Ronald Reagan, he runs the planet like The Apprentice. Also, he shredded a puppy.*
In Captain Britain, Mad Jim Jaspers is the Prime Minister of the United Kingdom... and also a Reality Warper whose powers drive him completely insane. He becomes a supervillain in two different Alternate Universes and leads campaigns to wipe out the world's metahuman population so he can play with the world undisturbed
Crops up very often in Axis Powers Hetalia fanfiction. Evil presidents and other 'bosses' in the near future are frequently used as either the villains themselves, or as the man behind the man, forcing the otherwise decent nations to do evil things.
Apparently, the people in John Carpenter's Crapsack World future in the Escape From... film series cannot get a good president. In ...New York, he was a scheming little crook, and ...LA had an outright religious psychotic.
The second guy actually managed to get the Constitution amended to stay president for life. His first act after that? Move the capital to his hometown (Lynchburg, VA).
The poster for The Final Conflict makes it seem like Damien becomes President of the United States. He doesn't; he does become the Ambassador to the Court of St. James though.
Bob Roberts becomes one at the end of the movie, after spending the whole movie revealing how corrupt and extremist he is (to the point of faking an assassination attempt to win sympathy votes and pin the blame on a journalist trying to expose him, which ends with the journalist getting shot and killed, presumably by one of Roberts' Loony Fans)
In Harry Potter and the Deathly Hallows Voldemort manages to take control over the Ministry of Magic and all of wizarding England by placing Imperius Curses over some officials, murdering others, and placing Death Eaters and sympathizers of his cause in positions of power. This allows him to (without much resistance, thanks to the previous Ministers) enact what would end up as a pureblood regime. However, Voldemort never seems interested in becoming Minister of Magic himself.
There were several attempts at justification in-story, mostly of the "Direct Parallels To Nazi Germany" variety. Voldemort and his most infamous Death Eaters stayed in the shadows, so mostly semi-legit followers/not-necessarily-enemies like Umbridge were the public face of the DE government; the general wizarding public were lied to as to what was really being done to half-bloods and muggle-borns, and those that did suspect the truth were either too scared to act (remembering Voldemort at his height, 20 years earlier) or were otherwise neutralized (like they attempted to do with the Weasleys).
In the Left Behind series, Nicolae Carpathia starts out as the president of Romania, and moves on to become Secretary-General of the UN (later called the Supreme Potentate of the Global Community). He's The Antichrist.
GamePro Magazine used "President Evil" during the April Fools issue (with a zombie version of Abe Lincoln on the cover) a few months after Resident Evil first came out.
In one of the Wild Cards books, Puppetman runs for president. (This is a man who controls people's minds to make them commit mayhem, just so that he can get off on their emotions, for crying out loud.)
Senor Steel, the president-dictator of Blanca Grande in the Doc Savage novel The Freckled Shark.
And the most recent book in the current story arc ends with Abeloth becoming president and the Sith in partial control of the Senate.
Despite appearing only briefly the President in Jason X Death Moon is quite obviously a lunatic.
The Presidents Vampire novel Red, White and Blood revolves around a plot by the Shadow Company to kill President Curtis and replace him with one of their pawns. The plan fails, but when the president confronts the vice-president about the vice-president's part in the plot, the vice-president murders him, thus becoming president.
Timeline-191 has Jake Featherston, President of the Confederate States of America, and thinly veiled Adolf Hitler analogue, who attempts a genocide of the CSA's black population.
The History of the Galaxy has President John Winston Hammer of the Earth Alliance, who orders a devastating strike on the unsuspecting Lost Colonies, hoping that such a show of force (and the millions of people killed by nuclear blasts) would force the colonies to recognize the military superiority of the Earth Alliance and allow unrestricted flow of immigrants from the overpopulated Earth. Instead of a quick victory, the colonists resist, and the quick strike turns into a devastating war lasting several decades across dozens of systems and ends with the colonies emerging as the victors.
Interestingly, after Hammer's death halfway through the war, the EA military brass decides to continue the war instead of suing for peace.
In the Song of Fire and Ice novels, King Joffrey Baratheon is nothing short (get it?) of a jerk to his populace and is only concerned with grabbing power.
Live Action TV
U.S. President Charles Logan and Russian President Yuri Suvarov from 24.
In Read All About It, Dunedon, the evil ruler of Trialveron, is also secretly Don Eden, mayor of our heroes' home town on Earth.
Nathan Petrelli /Sylar of Heroes becomes the U.S. Prez in the alternate future presented in "Five Years Gone", and tries to enact a program to kill off all the superpowered people in the world (except himself. Because "I can fly. I'm hardly dangerous.").
In "The Invasion Of Time", the Fourth Doctor himself becomes this for all of Gallifrey. It rather confuses his old teacher Borusa. (And it's all a ruse, of course.)
In "The Five Doctors", Borusa, now himself Lord President of Gallifrey, seeks to manipulate the Doctor's first five incarnations into recovering Time Lord founder Rassilon's fabled secret of immortality for himself so that he might rule Gallifrey forever.
In Series 1 of the new show, a Slitheen wearing the skin of a mid-level politician manages to become Acting Prime Minister by offing the real one and being the highest ranking elected official around during a time of crisis. Presumably he would have been replaced as soon as the panic subsided, but it gives the Slitheen all the time in power they need to spark a nuclear war and destroy the earth. This allows a very capable and sweet woman named Harriet Jones to become the new Prime Minister. However, the Doctor deposes Harriet Jones after she goes too far (in his opinion) during the next alien invasion a season later. She was supposed to be Prime Minister of the UK for three consecutive terms and lead the Golden Age of Britain. With the Doctor having altered her timelime, we instead get two absolute monsters:
Series 3: The first replacement for Harriet Jones. The Master, posing as Mr. Saxon, gets himself elected as Prime Minister of Great Britain, and promptly uses his authority to gas the Cabinet, declare the Doctor and his friends fugitives, arrest Martha Jones' family, make fun of/assassinate the US President, take over the world and generally act like a Magnificent Bastard. In the end, it is time-reverted, except for the deaths of the U.S. President and the British Cabinet. Ouch. In "The End of Time", he conquers the world by transforming all of humanity into carbon copies of himself, consequently making him president of every single country at once. Even acknowledges this himself: "I'm President! President of the United States! Look at me! Financial solution... deleted!".
Torchwood: Children of Earth: The second replacement for Harriet Jones. Prime Minister Green. True, the whole leadership of the government reluctantly goes along with the plan of handing ten percent of the world's children over to the 456, but they didn't really have any choice, and they're shown to take no enjoyment from crossing this Moral Event Horizon. However, at the end of the miniseries, when the 456 have just barely been defeated in time, Green proves himself to be truly morally corrupt by gleefully announcing how he plans to blame everything on the Americans. This proves to be the last straw for his cabinet, and they blackmail him into standing down.
Babylon 5: President Clark assassinates the previous president, under whom he served as vice president, and from there initiates an Iron-fisted regime that brooks no disagreement with him, particularly the crew of the main series setting who were actively working to expose his crimes and bring him down. His final act as president before offing himself is to set all Kill Sats in Earth's orbit to fire at the planet. Luckily, the good guys manage to stop them in time.
Various alternate realities in Stargate SG-1 where Senator Kinsey managed to become President.
A 4th season episode of Sliders ("California Reich") has a man, Governor Schick, running for President with a very good chance of winning... until the heroes expose the truth behind his "Repatriation Center" concentration camps. The guy's platform? "America for Americans" (a meaningless slogan for a nation of immigrants) and plans to deport anyone whose genes don't match with his ideal American, even if your great-great-grandparents were born in the U.S. That essentially means "anyone non-white". Somehow, he manages to impose this rule on his own state and ship countless people off to camps... and then they get turned into mindless drones called "Eddies" as cheap labor.
Governor James Devlin of Oz. On a show wall-to-wall with scumbags (it's set in a prison, after all), one of the worst is the guy on the outside campaigning on a "law and order" platform.
In an episode of The Outer Limits, a time traveler approaches a presidential candidate and warns him that his loss in the upcoming election will pave the way for one of these. As she continues to win him over, she eventually convinces him that his staff will sabotage his chances of winning, and that he needs to jump from the plane and leave them all to die (she'll protect him with her future-tech). He complies, and she's true to her word. Then she reveals he is the President Evil she spoke of, having gambled that he would be self-centered enough to save his own hide at the expense of everyone else. The plane will be fine, and he's just ensured that his political career is tarnished beyond recovery. Oh, and she didn't really save him. She just gave him a few minutes to find out the truth before putting him right back in mid-air to splatter on the ground.
King Geedorah, alter ego of rapper Daniel Dumile. His methods of dealing with dissenters are expounded upon in the song "The Fine Print": The short version is, he has their heads cut off and mounted on pikes in the middle of town square, where the peasants will throw rocks at the heads for weeks until vultures eventually devour them. As he says, "Maybe then they'll know the right words to speak out loud, at home, in the world, or in the streets."
Lord Recluse of City of Villains. Indeed, most of CoV takes place in Recluse's country, the Rogue Isles.
Kombayn Nikoladze from the first Splinter Cell game, president of Georgia, is using ethnic cleansing to seize neighboring Azerbaijan's oil, and later attacks the U.S. with information warfare when they try to stop him.
His successor is only marginally better, quickly turning on his allies when it proves convenient.
Metal Gear did it, too, with Solidus Snake - ex-President of the United States. The 'ex' part was the all important part, though. He was more a traditional baddie who happened to have once been President. The Patriots were a better example - the man plotted and often elaborate plan-loving council which secretly ruled the United States since about the 1970's, and have plans for world domination. It really gets bad when all the Patriots are either dead, in a coma, a vegetable, or actively trying to stop the rogue AI they created from trying to take over the world
In the console version of Rainbow Six 3, the Big Bad turns out to be the President of Venezuela, who is secretly the mastermind behind terrorist attacks on the U.S. by seemingly Middle Eastern groups.
Richard Hawk in Metal Wolf Chaos an evilvice-president turned president after he overthrows his running mate in a military coup d'etat. As for his 'evil' credentials during his actual tenure as president... Geez... Where do we start? 'The giant mechanical spider he sent rampaging through Manhattan', possibly. Or nerve-gassing Chicago. Or executing Metal Wolf sympathysers... and their family... and their friends... and their acquaintances if they don't fess up (complete with evil-eyed Lady Liberty on the ultimatum commercial). Or turning the White House into a missile-launching and armoured fortress and renaming it the 'Fight House'.
Pandak "Baby" Panay in the second Just Cause game holds Panau in his grip with a massive military junta.
The fourth Sam & Max adventure game episode of the first season, aptly titled "Abe Lincoln Must Die", sees the titular freelance police up in arms against an evil Abraham Lincoln. Or, in this case, a massive statue of Abraham Lincoln brought to life, who then tries to run for president. The only way to defeat him is for Max to become a President Evil himself, a position he still keeps afterwards. In the third season, it is strongly implied that Max has used dirty means to ensure that he keeps his office.
Max manages to remain the President even after he sells the United States to Canada.
For a while, there was a promotional website called maxforpresident.org, which contained a Donate button (not working on the Wayback Machine) which claimed to syphon dollars donated to organisations like the D'ni Restoration Council, The Communist Party of Rubacava, eBay, The Melee Island Bureau of Tourism and Sam's Wallet into Max's funds. His fundrasing goals were things like jaunty hats for his Secretary of State, spinning rims for the DeSoto, a girlfriend for his pet goldfish Mr. Spatula, an $254 Executive Box of tissues and 'recovery of Presidential email password'.
And then Mr. Spatula becomes Vice-President Evil and tries to off Max, accidentally getting himself killed.
The Big Bads of Fallout 2 and Fallout 3 are President Evils, focused on cleansing the post-apocalyptic world of any dangerous mutants. Given that, under their standards, the vast majority of the irradiated planet's surface-dwelling population would qualify as a dangerous mutant, including most of the good guys, this is obviously not a fun plan. Subverted by President Tandi and Kimball of the NCR, though Kimball is a jingoistic imperialist.
Andrew Ryan of BioShock is the president/founder/king of Rapture.
Subverted with Final Fantasy VIII, Vinzer Deling, president of the (mostly portrayed as) antagonistic Galbadian nation is made out to be the Big bad when the plot kicks off, only to be killed very early on by his Dragon, Edea.
The Purple Tentacle from Day Of The Tentacle manages to become POTUS and then enslave all the humanity.
In Saints Row IV, The Boss has gone from criminal kingpin/mass murderer to the President of the United States. More impressive is the fact that The Boss might not even be American (either being British or French). It's implied that they're less sociopathic as a president than as a gang leader, though, at least if their only presidential initiative shown (either "Fuck Cancer" or solving world hunger depending on what the player chooses) is any indication.
In the Choice of Games trilogy consisting of Heroes Rise, The Hero Project and HeroFall, the latter two games features President Victon (he is the mayor of Millennium City in the first game), who gets himself elected on the platform of Powered regulation and the support of the rapidly-rising Meek movement (as in, "the meek shall inherit the Earth"). Once in power, he proceeds to force all Infini-Powered heroes to submit to Power Nullifier treatments and works with the Meek to develop a device that will permanently de-Power everyone. Oh, and he also orders public executions of the Powered criminals he deems too dangerous to rehabilitate. However, this is only the tip of the iceberg. He is perfectly willing to risk the lives of millions of people for political purposes, gets the Player Character's parents framed for murder, works with a cabal to get an Infini-Powered ex-criminal to lose control of his powers on live TV, among many other crimes.
Subverted in thisSluggy Freelance strip, where the president who's secretly a centuries old wizard who enslaved people's souls isn't actually that bad.
President Kesandru: Living hundreds of years changes you. I used to toy with people, destroy people, all with the selfish goal of untold wealth and power. Now I want to help people, to make up for past deeds. Take steps to make this a better place for everyone ... while still attaining untold wealth and power.
Torg: Politics. It's like having evil cake and eating it too!
The Japanese Beetle featured an evil android named Hypnotron whose Compelling Voice fueled a villain-organized run for the Presidency, but ultimately failed because, as a newly-built android, he's too young to legally be President. A later storyline had him succeed in disguising himself as George W. Bush and taking over America, using his powers to alter the world in subtle ways until a few heroes and villains catch on and fight back.
Zexion was elected governor of Pennsylvania in Ansem Retort. So far, he's stolen tax dollars to finance his best friend's wedding (just to prove he can) and invaded New Jersey. (Granted, he's only a lesser office, not President. Yet.)
In a more recent season, he sold New Mexico back to Mexico for the right of all US citizens to have sexy Latino names. His is Guillermo del Zexiero lo Marquis.
This was Dr. Insano's debut on the Spoony Experiment; he was a merciless parody of Sorceress Edea in Final Fantasy VIII becoming a country's leader despite openly despising her own subjects and burning the legitimate President of the country alive.
And supervillain Gizmatic (now King Wilkins) has his own country, the Caribbean island now known as Karedonia.
Both of the presidents featured in the e-novel EHUD Prelude To Apocalypse are evil, although one is more of the corrupt old polititian kept aloft by corrupt advisers type, while the other is definetly a terrible, terrible human being, even before getting elected.
Parodied in an episode of Futurama, in which it is mentioned that during the 27th century, a supervillain was elected governor of New York. During his term, he stole all the major world monuments and put his face on Mount Rushmore (which he also stole).
And more "currently" on the show, there's Earth President Richard M. Nixon's Head, who needs no explanation to people familiar with actual American history.
In the same episode where Nixon gets elected, there's a side discussion about the first robot president, John Quincy Adding Machine, who "struck a chord with the voters when he pledged not to go on a killing spree." "But, like most politicians, he promised more than he could deliver. "
A Lincoln-style monument depicts a president (in the sixties I think) who was apparently a brutal alien warlord. His chair is surrounded by a pile of human skulls. The people of Earth apparently do not care who they elect.
What does this have to do with "people"?
In Codename: Kids Next Door, student council president Jimmy McGarfield revealed at the end of his debut appearance that he was in allegiance with the adults instead of the kids. At the end of his next appearance, he was sent to prison, leaving Numbuh 1 confident that he would take his place, only to find out that the Delightful Children From Down the Lane had in fact bought the election and become president(s) themselves.
Technically only Governor Evil, but when Nathan Explosion was elected governor of Florida in Metalocalypse, Florida ended up decimated and abandoned due to his rampant disregard for life. Crime was up, the economy was in the tank, etc. He did try to help Florida by putting on a concert, but that ended up summoning a hurricane. The funniest part? He's still regarded as the greatest governor Florida ever had.
Not technically president, but "his dishonor" the Mayor from Action League Now can qualify for this. He does everything from kidnapping children, stealing priceless artwork, melting his chief nuclear safety adviser, causing massive train wrecks (he wanted the insurance money), unleashing ancient mummy curses, taking out NFL quarterbacks, and trying to blow up Washington D.C., all complete with a huge grin on his face, and evil pointed eyebrows. But despite all his acts of villainy, he's never removed from office.
In The Simpsons, the aliens Kang and Kodos impersonate Bill Clinton and Bob Dole during the 1996 election, figuring one of them would be elected. When Homer reveals the truth, the aliens claim that American citizens have to vote for one of them anyway and voting for a third party would be pointless. The ending of the episode shows that Kang has been elected President, and he proceeds to enslave humanity and forcing them to build monuments. Homer claims it's not his fault, as he voted for Kodos.
Another episode had Sideshow Bob running for mayor of Springfield. His campaign discredits Quimby by saying that Quimby released the three-times attempted murderer Sideshow Bob.
Justice League had an alternate reality where the president of the US was Lex Luthor. But it may be up to discussion who was the real president evil there, if Lex Luthor, or the Justice League that made a coup d'état and killed him in the process. It may be an alternate universe, it may be Lex Luthor the one voted by the people, but it's still America! In the mainstream universe, the Question tries to kill Luthor to prevent him from becoming president evil too. Luthor then pummels the Question with his new superpowers. He remarks that becoming president would cause him to lose power. He freely admits that he ran a fake campaign "just to tick Superman off."