Rick Santorum put pressure on Newt Gingrich to bow out of the presidential race Tuesday, telling Fox News the former House speaker is making it “hard for me” to win primary contests without having much of a shot at the nomination himself.

The comments come as the four remaining Republican contenders face off Tuesday night in a duo of Southern contests.

Polls have shown the candidates in a tight race for Alabama and Mississippi, and the stakes are high for Mitt Romney’s rivals. A win for Romney in the deep South would help the former Massachusetts governor prove he has broader appeal. But his competitors are unquestionably in need of the delegates and momentum, which victory on Tuesday would provide.

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