WASHINGTON (AP) - Newt Gingrich says he and other GOP presidential candidates must win their home-turf contests or face serious questions about continuing in the race.

Gingrich tells "Fox News Sunday" that if Mitt Romney loses in Michigan, which is next to vote on Feb. 28, "I don't see what he says the next morning to his donors to stay in the race."

But Gingrich also acknowledges that he must win in Georgia, which votes on March 6 - and the same is true for Rick Santorum and the Pennsylvania primary in April.

He says lose and risk becoming "a very, very damaged candidate."

But Gingrich stopped short of saying he would drop out if he lost Georgia "given the chaos of this race."

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