March 13, 2012
Republican presidential candidate former House Speaker Newt Gingrich smiles as he walks to the First Baptist Church for Sunday evening services in Brandon, Miss., Sunday, March 11, 2012. (AP Photo/Rogelio V. Solis)
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Republican Newt Gingrich says he plans to campaign for president until the party's nominating convention in August, but his candidacy largely rests on the results of Tuesday's primaries in Alabama and Mississippi.