The race for the GOP nomination to replace Oklahoma's term-limited Governor Mary Fallin tops this week's unusually high number of primary runoff elections.
Former Oklahoma City Mayor Mick Cornett and Tulsa mortgage company owner Kevin Stitt are pitching their case to Republican voters heading into Tuesday's vote, as are candidates for several other statewide and congressional offices.
Mike Hunter and Gentner Drummond are facing off for the Republican nomination for Attorney General.
The Republican nomination for Lieutenant Governor is also up for grabs. Voters will be choosing between Dana Murphy and Matt Pinnell.
And current state School Superintendent Joy Hofmeister is still working to get on the November ballot. She's in a runoff with Linda Murphy.
A record number of candidates sought political office this year, with eight-year term limits forcing open nearly every statewide elected office following the Republican Party's sweep of power in Oklahoma in 2010.
This year's candidate filing period also coincided with a teacher walkout that prompted dozens of public school teachers to seek office.
Polls are open across the state from 7 a.m. to 7 p.m. Tuesday.
The Oklahoma Election Board has an online tool to help locate your election polling location.
Stay with News On 6 Tuesday evening for the most complete coverage as Oklahoma Votes.
The Associated Press contributed to this report.