(CNN) - Following his big rally endorsing Herman Cain for president in South Carolina last week, comedian Stephen Colbert announced Monday he was calling it quits.

"My fellow Americans of South Carolina: While your turnout on Saturday was historic, unfortunately–and no one could have predicted this–Herman Cain did not win the South Carolina primary," Colbert said on his Comedy Central show.
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(CNN) – A week ago, the Gallup daily tracking poll of registered Republicans around the country had Mitt Romney at 37% with Newt Gingrich at only 14% percent. Guess what? That 23-point spread has now disappeared. The new nation-wide Gallup numbers: Romney 29% percent to Gingrich’s 28% percent. That’s a statistical tie well within the 3-point sampling error.

It only goes to show you how quickly political fortunes can change. Fresh from his double-digit victory over Romney in South Carolina, Gingrich now certainly has the political momentum going with him into Florida’s January 31 primary. He seems to be on a roll.

Washington (CNN) – After a spirited week of campaigning and debating in South Carolina, all eyes are now on Florida as the GOP presidential candidates prepare for the January 31 primary in the pivotal state.

Also this week, Mitt Romney will release his 2010 tax return and an estimate of his 2011 tax liability, the former Massachusetts governor said.

(CNN) - Two of South Carolina’s longest-serving elected officials said Sunday that campaign mistakes by Mitt Romney helped Newt Gingrich run away with the state’s first-in-the-South primary.

Republican Sen. Jim DeMint, a powerhouse in conservative politics, told CNN Chief Political Correspondent Candy Crowley that Romney bungled calls in the last week to release his income tax returns. Romney committed Sunday to releasing his tax forms on Tuesday.
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Columbia, South Carolina (CNN) – Republican presidential candidate Rep. Ron Paul, R-Texas, told supporters on Saturday that he has embarked on a strategy to amass as many delegates to the Republican National Convention as possible because "that's the name of the game."

His comments signaled that even though he finished fourth in a four-man field in the South Carolina primary, he has no intention of giving up.

Columbia, South Carolina (CNN) – After riding into South Carolina on a wave of seeming inevitability, Mitt Romney was dealt a series of blows here that culminated with a disappointing second-place finish in the state's high-stakes primary.

Even before losing to Newt Gingrich by a large margin Saturday night, Romney's team began to look ahead to Florida, where the campaign hoped a big lead in fundraising and on-the-ground organization could help him regain his momentum.

(CNN) - South Carolina voters sent a clear message Saturday to the GOP's Yankee frontrunner: not so fast.

Any hopes Mitt Romney had of bringing a quick end to the Republican presidential contest died in the Palmetto State. Newt Gingrich's easy win capped the worst week of the campaign so far for the former Massachusetts governor.

Charleston, South Carolina (CNN) – Former Pennsylvania Sen. Rick Santorum finished third in the first Southern state primary, a disappointing showing for the candidate who just days ago was declared the winner of the first 2012 GOP presidential contest in Iowa.

Santorum conceded to CNN in an exclusive interview that the winner, former House Speaker Newt Gingrich, "kicked butt" in South Carolina but argued the 2012 GOP nomination fight would be a long race.

Columbia, South Carolina (CNN) – South Carolina primary winner Newt Gingrich told a victory party chanting, "USA, USA," Saturday night that they had captured the heart of his campaign.

"The fact is we want to run not a Republican campaign - we want to run an American campaign," he said.

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Columbia, South Carolina (CNN) – Newt Gingrich has won the South Carolina GOP primary, CNN projects, with Mitt Romney finishing second.

Gingrich's projected victory marks a stunning turnaround for a campaign that observers had left for dead - again - just weeks ago.