Describe politics in Fahrenheit 451. What’s happened to them?

In an authoritarian society like the one depicted in Fahrenheit 451, politics are pretty much irrelevant. As politics are largely concerned with managing the choices and preferences of different groups and individuals, it's no wonder that there's no political life to speak of in this society. The government doesn't recognize difference, whether in politics or anything else. It wants everyone to be the same, talk the same, and act the same.
Thus, the political process is nothing more than a charade, a form of entertainment in which people opt for the candidate with the nicest smile. No one's really voting for change; they're just voting for the appearance of change. If the government seriously thought that voting would change anything, they wouldn't allow it in the first place.
Deprived of books and encouraged to rot their brains by zonking out in front of the TV, voters in this society lack the discernment and critical thinking skills necessary to make informed choices. So they stick with the inappropriately named President Noble, for the sole reason that he comes across well on TV.

In part 2, Montag returns home after visiting Faber to find Mildred and her superficial friends watching the parlour wall televisions as usual. Montag immediately unplugs the wall televisions, and the nervous women begin discussing the "quick war" that their nation is fighting. After Mrs. Phelps and Mrs. Bowles reveal their lack of concern and compassion for their husbands and children, Mildred suggests they talk about politics.
Mrs. Bowles begins by mentioning that last election she voted for President Noble because he was "one of the nicest-looking men who ever became president." The women then comment on President Noble's political opponent, Hubert Hoag, who was a candidate from the political party known as the "Outs." Instead of discussing their different policies, the women are appalled that a short, unattractive man with an ugly name would even think about running against a taller, attractive politician. When Montag intervenes and asks what they even know about the two politicians, the women can only recall that one of the candidates was always picking his nose on the screen.
In this brief conversation regarding politics, Bradbury satirizes America's political climate by commenting on how political campaigns are predominately focused on image, appearance, and invoking an emotional connection with the citizens—instead of emphasizing the politicians' actual policies. The fact that Hubert Hoag is representing a party known as the "Outs" suggests that there is a sharp divide between the rich and poor, the privileged and oppressed, in Bradbury's dystopian society. Also, the commentary provided by Mildred and her friends illustrates how ignorant and uninformed the citizens are regarding their country's politics. President Noble also seems more like a male model with a trustworthy name than a capable politician.