Which Republicans could have a chance of defeating the Democratic presidential nominee in 2016?

This poll operates like a wiki: feel free to update its summary and, if applicable, add a new, better option to the poll itself.

This poll is currently closed. The question and the poll set up were not satisfactory. A new replacement poll will soon be set up.
See the discussion here:
Setting up the polls for the 2016 US Presidential elections.

See also:

Choice Blog entries Votes for votes score
100 %Jon Huntsman0222
50 %Condoleeza Rice0121
50 %Chris Christie0121
50 %Marco Rubio0121
50 %Jeb Bush 0121
0 %Rick Santorum0020
0 %Mike Huckabee0020
0 %Paul Ryan0020