Another possibility is that a new candidate could enter the race right now, although it is too late to file for candidacy in all but 10 of the remaining primary contests. Without a chance of winning the nomination outright, that candidate would have to barter with the others as well.
And, so far, none of the possible white knight candidates—Jeb Bush, Chris Christie, or Mitch Daniels—have shown any interest in shaking up the race. The Republicans may have to choose with what they've got.
- See political cartoons about the GOP hopefuls.
- Social media predicts Romney win on Super Tuesday.
- How the manufacturing news helps Obama.