Basic Trope: A right-of-centre political party chooses an attractive spokeswoman to show that they are "regular folks."
Straight: Alice becomes the spokeswoman for a group seeking to elect Colin Conservative for President. She is pretty, popular, and charismatic, and attracts a lot of new voters (particularly male voters).
Exaggerated: Alice doesn't even speak; her only role is to stand there and look pretty.
Downplayed: Alice is a right-leaning political commentator who's not affiliated with any particular candidate, although she usually puts a good word in for Republicans. She's attractive and under forty, but she has sensible, unfussy Power Hair and dresses conservatively, so her looks aren't emphasized.
Alice is Colin's wife or girlfriend (who agrees with these issues), and she wants to be supportive and help him get elected.
Alice does this out of free will, and she is charismatic enough to get people to listen to her.
Exploited: Alice, a visual dead ringer for her favorite TV actress who has also announced her intention to vote for Colin, makes a Kitschy Local Commercial extolling his virtues. A Tory pollster sees it on TV and realizes the party can use her to shore up their credibility with people who aren't particularly wealthy or famous.
Alice refuses to endorse Colin when asked, deciding then either to endorse Lewis or to stay independent.
Colin runs a strictly message-based campaign because he regards beautiful women as personally distracting.
Discussed: "Colin is employing the Distracted by the Sexy approach on heretofore skeptical moderates ... and it seems to be working, as the latest Trope Co. poll indicates he has overtaken Lewis by 17.3 percentage points as of 45 minutes ago."
Conversed: "It could easily have turned into the world's most didactic Author Tract, but thankfully, those writers didn't just go after targets of risible ease like Ann Coulter."
Deconstructed: It ends up looking hypocritical for a party that believes in conservativesocialmores to parade a beautiful woman around as a prop, thus relying on the trope Sex Sells. Also, it distracts from the real issues, and what if the spokeswoman in question is unaware of the issues (if they chose a Brainless Beauty), and/or does not agree?
Reconstructed: When choosing a spokesperson, said spokesperson is elected because of their talents, not their looks, and Alice is not overly pretty. Furthermore, the party gets several different people to expound on how great they are, not just Alice.