Alan Keyes also gave us important evidence regarding the existence of the 27 percenters:

27 Percenters - Those Americans who will predictably vote against their own best interests. In his seminal post on the Crazification Factor, John Rogers used the 2004 Obama/Keyes senate race as a measure: "Keyes was from out of state, so you can eliminate any established political base; both candidates were black, so you can factor out racism; and Keyes was plainly, obviously, completely crazy. Batshiat crazy. Head-trauma crazy. But 27% of the population of Illinois voted for him. They put party identification, personal prejudice, whatever ahead of rational judgement. Hell, even like 5% of Democrats voted for him. That's crazy behaviour. I think you have to assume a 27% Crazification Factor in any population."

Or, as commenter Davis X. Machina phrased it:

"The salient fact of American politics is that there are fifty to seventy million voters each of who will volunteer to live, with his family, in a cardboard box under an overpass, and cook sparrows on an old curtain rod, if someone would only guarantee that the black, gay, Hispanic, liberal, whatever, in the next box over doesn't even have a curtain rod, or a sparrow to put on it."