JACKSON, Miss. (AP) — Mississippi voters are choosing a Republican nominee for U.S. Senate, ending one of the state's hardest fought and most expensive races in decades.
Polls are open 7 a.m. to 7 p.m. Tuesday.
The statewide primary runoff is between six-term incumbent Thad Cochran of Oxford and a tea party-backed challenger, state Sen. Chris McDaniel of Ellisville.
McDaniel finished 1,418 votes ahead of Cochran in a three-person primary earlier this month, but nobody received a majority to win.
The only voters banned from casting a Republican ballot Tuesday are those who voted in the Democratic primary June 3.
The Republican nominee advances to the general election to face the Democratic nominee, former U.S. Rep. Travis Childers, and the Reform Party's Shawn O'Hara, who's run for dozens of offices the past two decades.