Rick Santorum

Rick Santorum is endorsing his one-time bitter rival Mitt Romney in a late-night e-mail to his supporters.

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It was a process that many thought would not end until the GOP Convention.  And while it is still not "officially" over, the main event is finally booked with the belt up for grabs being the leader of the free world.

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Campaign says Santorum's daughter is recovering GOP presidential candidate Rick Santorum's campaign says his hospitalized daughter is recovering and could be released soon.

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The ill daughter of Republican presidential candidate Rick Santorum has been hospitalized.

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A senior strategist for Rick Santorum's campaign is suggesting it's time for Newt Gingrich to bow out, after being defeated by Santorum in yesterday's two primaries in Mississippi and Alabama.

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Rick Santorum predicted Monday that he would get the Republican presidential nomination if the race remains undecided by the time the party holds its nominating convention this summer.

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Mitt Romney and Rick Santorum are trying to make the most of a mixed Super Tuesday, each claiming a measure of victory but unable to settle the most tumultuous race for the GOP presidential nomination in decades.

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Mitt Romney scored a hard-won, home state triumph in Michigan and powered to victory in Arizona Tuesday night, gaining a two-state primary sweep over Rick Santorum and precious momentum in the most turbulent Republican presidential race in a generation.

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Primed for a fight, Mitt Romney and Rick Santorum traded fiery accusations about health care, spending earmarks and federal bailouts Wednesday night in the 20th and possibly final debate of the roller-coaster race for the Republican presidential nomination.

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Philosophical differences between the top two Republican presidential candidates are becoming starker.

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