Gingrich's favorable rating among white evangelical likely caucus-goers is 60 percent - compared to just 31 percent for Romney. Only 18 percent hold an unfavorable view of Gingrich, compared to 43 percent for Romney.... More than half of likely Republican caucus-goers (55 percent) say it is at least somewhat important a candidate share their religious beliefs, a figure that rises to 80 percent among white evangelicals. Eighty-five percent overall (including 77 percent of white evangelicals) say they would vote for a Mormon candidate, though just 67 percent say most people they know would vote for a Mormon.

Another way to put this is that 23 percent of white evangelicals will not vote for a Mormon, period. They even ranked Gingrich's personal life higher than Romney's.