Republican presidential rivals Mitt Romney and Rick Santorum collided today in a rancorous Michigan primary that tested the clout of the GOP establishment against conservative and tea party rebels as well as the candidates themselves.
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Romney and Santorum collide in Michigan primary
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Rick Santorum to suspend his campaign
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Can Santorum win the GOP nomination?
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Mitt Romney raised more money in Michigan than Obama
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Romney takes a narrow lead over Obama:
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Mitt Romney taps Ohio Sen. Rob Portman to play President Obama in debate preparations
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'Mitt Romney is the Prince Charles of the Republican nomination'
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Santorum files to appear on in ballot
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Santorum suspends presidential campaign
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Republican Senate candidates debate tonight
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Republican candidate Mitt Romney drops out of US presidential race
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Souder against moving Indiana primary
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Romney predicting victory in Wisconsin GOP primary
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Rick Santorum suspends campaign
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Dumped candidates give Katter headaches
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Region race heats up
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Romney hates America?