Tennesseans head to the polls today to vote for their choice in the Republican presidential primary. While early voting numbers were sharply down from the last presidential primary in 2008, the major GOP candidates ramped up their attention to Tennessee in the last week with campaign stops and a barrage of television ads. Former Massachusetts Gov. Mitt Romney has drawn the endorsement of several top Republicans in the state, including Gov. Bill Haslam and U.S. Sen.