Primaries in four states tonight could help shape the battle for control of Congress.
Some of the polls have closed in Indiana, where Republicans are choosing a nominee to challenge Democratic Sen. Joe Donnelly.
State and federal offices are on the ballot in four states. Voters will determine the matchups for the November midterm elections, which will decide control of the U.S. House and U.S. Senate, as well as the Ohio governor��s race.
In West Virginia, the GOP has been on edge about the possibility of scandal-plagued Don Blankenship, the former coal executive, winning the Senate nomination. Republicans fear he would stand little chance against Democratic Sen. Joe Manchin III in the November general election.
In Ohio, voters were choosing the Democratic and Republican nominees for governor. Republican Gov. John Kasich is term-limited.
Two Republican incumbents in North Carolina, Reps. Walter Jones and Robert Pittenger, face spirited primary challengers.