In one of the most closely watched Republican primary races so far, GOP candidate Knoxville Mayor Bill Haslam has won with 51 percent.
The AP called the race with 5 percent of precincts reporting.
Mr. Haslam was locked in a tight race with Lt. Governor Ron Ramsey and 3rd District U.S. Rep. Zach Wamp. Both candidates had spent heavily and recent polls numbers showed a tight race in the five-way primary.
Mr. Haslam will now face Democrat Mike McWherter, a West Tennessee businessman with a famous political last name.
Mr. Wamp had 27 percent of the vote, while Mr. Ramsey captured 21 percent–that with 9 percent reporting.