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Newt Gingrich conceded Sunday that losing his home state of Georgia in the upcoming Super Tuesday primaries in March would "badly" weaken his candidacy.

Whether voters see a principled stand or ruthless capitalism in Mitt Romney’s 2008 opposition to the auto industry rescue will affect how he fares in Michigan’s primary and likely beyond.

A resurgent Rick Santorum hopes to spring his next big surprise in Michigan. Newt Gingrich looks for a campaign revival in the Bible Belt. Mitt Romney has his home state of Massachusetts, and the luxury of picking his spots elsewhere, if not everywhere, as the race for the Republican presidential nomination roars back to life.

CNN has canceled plans for a GOP presidential debate on March 1, after Mitt Romney and Rick Santorum indicated they would skip the event. "Without full participation of all four candidates, CNN will not move forward with the Super Tuesday debate," CNN said in a statement.

A political group supporting Mitt Romney’s Republican presidential bid began airing television advertisements in Michigan today, charging that rival Rick Santorum is a “big spender” and “Washington insider” who backed letting convicted felons vote.

Rick Santorum is on the air in Michigan with positive campaign ads, including one saying he has the "best chance" against President Obama.

Once thought an easy win for former Massachusetts governor Mitt Romney, the Michigan Republican primary is shaping up to be one of the biggest tests yet for Romney’s presidential hopes — and an unexpected opportunity for the surging campaign of former Pennsylvania senator Rick Santorum.

It appears that GOP presidential candidate Mitt Romney now has a Rick Santorum Internet-age problem. Searching for "Romney" using Google now yields a page defining the meaning of the term as "to defecate in terror" within the first five links or so.

Reversing his embarrassing string of setbacks earlier this week when he lost Colorado, Minnesota and Missouri to Rick Santorum, Mitt Romney eked out a narrow win in the straw poll tied to Maine's multiday caucuses Saturday, defeating Rep. Ron Paul of Texas, who was the only other candidate to actively campaign in Maine.

In an effort to reverse a three-state losing streak, the Romney campaign announced that its candidate would put off his first trip home in 2012, and instead visit two caucus sites in Maine.