Strident attacks continue on eve of GOP debate

(CNN) – On the eve of the last debate before crucial primaries, Republican presidential challengers Rick Santorum and Newt Gingrich battled for conservative support by targeting President Barack Obama in increasingly strident attacks Tuesday. Santorum told a crowd in Arizona, which will hold its primary with Michigan on February 28, that Obama and liberals consider the U.S. Constitution an out-of-date document for modern times.

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Strident attacks continue on eve of GOP debate