Cain was only cynical in a humorous way. By the time he really thought he was going to win, he was already lost.
Everything that Rick Perry did in this race was done in the most cynical way possible. Years from now, people are still going to be scratching their heads over how he managed to lose - he is exactly what the GOP primary voters want.
The answer is that while he was willing to do and say literally anything to get elected, he 1) figured out too late just how close the primary voters take their revenge-America-on-all-Mexicans-all-the-time-even-if-it-doesn't-make-sense plank and 2) was actually too dumb for them to select him.
I think they got snookered a little bit by the media on that second point. He's plenty dumb, but I disagree that he's too dumb for this crowd to pick him.
If Gingrich wins South Carolina Tuesday, you're about to see the ugliest single campaign of any type run in our lifetimes. It will make Clinton-Obama look like a Sunday school picnic.
PS Please, please let that happen.