Yup, and even if there is an arguable reason for quitting it doesn't sell well. Americans don't like quitters. You can fail and try again, but you can't quit.
As for Eric Cantor; I like him very much. his fatal flaw vis a vis electability is that he is Jewish. America is generations away from electing a Jewish POTUS, especially a conservative one.
American elected an adherent of the obamunist religion...I wouldn't be deterred by someone being Jewish. Although perhaps some might.
As you said, it is early yet...
It is indeed. But let me entice you with an entertaining thought for a moment...picture a presidential debate between Obama and Cantor.
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IMO America elected a smooth talking dream as a rebellious act against daddy (middle-aged, white Christian males) not an openly muslim person.
No Jewish candidate could win but not just because of inherent anti-semitism alone. The ME is the powder keg upon which the world sits. The US has been the only power that has been able to keep it from exploding. Election of a Jewish POTUS would kill that, leaving the way open for a greater arab led jihad against Isreal and its openly "Jewish" partner, the USA.