But among the 34 percent who said they disapproved of the war, McCain had a wide advantage over the GOP field -- even over Texas Rep. Ron Paul, the sole advocate of a U.S. withdrawal in the Republican field.

CNN: Exit polls: Women push Clinton to New Hampshire win

But it is the GOP field's most conservative candidate -- Ron Greer, a black minister and former firefighter -- who has attracted the most attention.

CNN: By Gregory L. Giroux, CQ Staff Writer

The obvious question all along has been what happens when the field winnows down to Romney, the irrepressible Ron Paul and a lone Tea Party and social conservative candidate.

FORBES: Remember Christine O'Donnell? The GOP Should