Oklahoma voters head to the polls Tuesday for a primary election in which every Republican and independent in the state will have some contest to decide, along with most registered Democrats.
Each of the state's five incumbent Republican U.S. House members face a GOP challenger, but there are only Democratic primary contests in congressional races for the 2nd District in eastern Oklahoma, 4th District in south-central Oklahoma, and the 5th District in the Oklahoma City area.
There are no Republican or Democratic primary contests in the race for Oklahoma's U.S. Senate seat, but there is statewide Libertarian Party primary, and all of the state's more than 280,000 registered independents are invited to vote in that.
Registered independents also have the option of voting in the Democratic primary.
The Oklahoma State Election Board has an Online Voter Tool you can use to find out where to vote on Tuesday and check out sample ballots.
The Associated Press contributed to this report.