A sign of Iowa's effect on national support among GOP primary voters:
Former U.S. Senator Rick Santorum, coming off his photo finish with Mitt Romney in the Iowa caucuses, is now in second place among Republican voters in the race for the party’s 2012 presidential nomination.
The latest Rasmussen Reports national telephone survey, taken the night after the caucuses, shows Romney again in first place with support from 29% of Likely Republican Primary Voters, followed by Santorum with 21%. -- Rasmussen
Of course, all three are NOM Marriage Pledge signers.