The tea party has been at the forefront of the anyone-but-Mitt Romney campaign but has not yet curbed his momentum. If the movement fails to propel tea-party favorite Newt Gingrich to victory in South Carolina, its clout could come into question.
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Kellyanne Conway, campaign manager for President-elect Donald Trump, smiles as she arrives for a party at the home of Robert Mercer, one of Trump's biggest campaign donors, Saturday, in Head of the Harbor, N.Y.