campaign trail thursday. first up, rick perry dropped and and endorsed rick gingrich. we learn mitt romney did not win the iowa caucuses. at the end of the day a fiery debate. nbc s steve handelsman reports. reporter: four are left and newt gingrich had the hot hand. the endorsement of rick perry and surging polls in south carolina, so gingrich blew up when the first question in the cnn debate. when the story has now gone viral on the internet. reporter: was about his ex-wife and infidelity. she says you asked her, sir, to enter into an open marriage. the story is false. to take an ex-wife and make it two days before the primary, a significant question in a presidential campaign is as close as despicable as anything i can imagine. reporter: mitt romney has learned he lost the january 3rd caucuses to rick santorum. the work to get 25 more votes in iowa, that s for sure. reporter: now rivals are slamming his business takeovers that led to firings. i find it ki
memorable day on the gop campaign trail thursday. first up, rick perry dropped and and endorsed rick gingrich. we learn mitt romney did not win the iowa caucuses. at the end of the day a fiery debate. nbc s steve handelsman reports. reporter: four are left and newt gingrich had the hot hand. the endorsement of rick perry and surging polls in south carolina, so gingrich blew up when the first question in the cnn debate. when the story has now gone viral on the internet. reporter: was about his ex-wife and infidelity. she says you asked her, sir, to enter into an open marriage. the story is false. to take an ex-wife and make it two days before the primary, a significant question in a presidential campaign is as close as despicable as anything i can imagine. reporter: mitt romney has learned he lost the january 3rd caucuses to rick santorum. the work to get 25 more votes in iowa, that s for sure. reporter: now rivals are slamming his business takeovers that led t