January 4, 2012
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum addresses supporters at his Iowa caucus victory party Tuesday, Jan. 3, 2012, in Johnston, Iowa. (AP Photo/Charlie Riedel)
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A squeaker of an Iowa victory in hand, Mitt Romney headed into the New Hampshire primary insisting that staying power sets him apart from runners-up Rick Santorum and Ron Paul and the rest of the GOP presidential field. Two rivals already looked shaky — last-place finisher Michele Bachmann canceled a campaign trip Wednesday and Rick Perry was heading home to Texas to think things over.