Gingrich now has 31% support from registered Republican voters in the Gallup daily tracking poll, compared with 27% for the former Massachusetts governor,Mitt Romney.
Gingrich now has completely erased a 23-point advantage Romney enjoyed earlier this month. Gingrich's standing reflects a surge last week, when he pulled in two strong debate performances and soundly defeated Romney in the Jan. 21 South Carolina primary.
Rick Santorum and Ron Paul each have 12% support among GOP registered voters nationwide, Gallup says
