(120104) -- DES MOINES, Jan. 4, 2012 (Xinhua) -- A worker collects votes for U.S. Republican presidential candidate Mitt Romney at a caucus site in Merill Middle School, just outside downtown Des Moines, capital of Iowa, the United States, Jan. 3, 2012. Former Pennsylvania Senator Rick Santorum and former Massachusetts Governor Mitt Romney basically tied in Iowa Caucuses on Tuesday night, with only an 18-vote margin separating the two after more than 99 percent of the votes were counted. (Xinhua/Zhang Jun) (zw)
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