OKLAHOMA CITY - It was a low turnout Tuesday across the state for Oklahoma's primary elections contest.

The most-watched contest was for the 2nd Congressional District seat being vacated by Dan Boren, who announced in 2011 that he wouldn't seek re-election. Six Republicans and three Democrats were vying for their parties' nominations.

Elsewhere, incumbents John Sullivan, Frank Lucas and Tom Cole all faced congressional primary challengers from fellow Republicans. There was no primary in the 5th District, which includes Oklahoma City.

The only statewide election on the ballot is a Republican primary for a six-year term on the Oklahoma Corporation Commission.

Republican Rep. Tom Cole was nominated for re-election in Oklahoma's 4th Congressional District.

U.S. Rep. Frank Lucas has won the Republican nomination in Oklahoma's sprawling 3rd Congressional District.

Lucas defeated GOP challenger William Stump in Tuesday's primary election. He will face the winner of the Democratic primary and independent William Sanders in the general election in November.

Lucas is Oklahoma's senior member of the U.S. House and is seeking re-election to an 11th term. Lucas is chairman of the House Agricultural Committee and says his leadership helps determine national agricultural policy when Congress writes legislation impacting farmers and ranchers.

The 3rd District includes more than 34,000 sq. miles and is Oklahoma's largest congressional district, taking up almost half its land mass. It is one of the largest agricultural regions in the nation and comprises all or part of 32 of Oklahoma's 77 counties.

The chairman of the powerful Senate Appropriations Committee has defeated a tea party-backed Edmond pastor in a bitterly fought Republican primary battle for a state Senate seat.

Clark Jolley defeated Paul Blair Tuesday, securing the GOP nomination for the District 41 seat he first won in 2004.

A former professional football player and the pastor of Fairview Baptist Church, Blair described himself as a "true constitutional conservative."

The campaign grew particularly nasty, with a political action committee funded by several major Oklahoma corporations spending tens of thousands of dollars attacking Blair.

The negative ads prompted Blair to file a defamation lawsuit against Jolley and the PAC last week.

Jolley will face independent Richard Prawdzienski in November.

A retired schoolteacher whose anti-gay rant drew national attention has won re-election to a fifth term in the Oklahoma House.

Sally Kern defeated Republican challenger Curtis Moore to retain the seat in the northwest Oklahoma City suburb that she has held since 2004. Because there were no Democrats to file for the post, Kern automatically wins it with the primary victory.

In 2008, Kern said homosexuality poses a bigger threat to the U.S. than terrorism. She refused to apologize for her remarks, despite an outcry from gay rights supporters across the country.

Kern was publicly reprimanded in the House last year after she made disparaging comments about blacks and women during debate on an affirmative action bill. She later apologized.

Timothy Ray Murray has won the Democratic nomination in Oklahoma's sprawling 3rd Congressional District.

Murray defeated fellow Democrat Frankie Rollins in Tuesday's primary election. He will face the winner of the Republican primary and independent William Sanders in the general election in November.

If elected, the 45-year-old Murray has vowed to create more high paying jobs in the western Oklahoma district and create incentives for businesses. Murray says he supports federal health care overhaul legislation that is being challenged in federal court.

Robbins has run unsuccessfully for the 3rd District seat twice before, in 2008 and 2010. A retired civil engineer in the U.S Department of Agriculture's Forest Service, Robbins had said he would work to change the tone of political discourse and put an end to partisanship and misinformation.

Democrats have chosen 34-year-old political newcomer Donna Bebo of Fletcher as the party's nominee in Oklahoma's 4th Congressional District.

Bebo defeated Bert Smith of Moore in Tuesday's primary and will face incumbent Republican Rep. Tom Cole and independent R.J. Harris in the November general election.

Smith has said he will support Bebo and both say they believe a Democrat can win in Oklahoma -- a state considered to be among the reddest of the red states.

Bebo says she believes she will have support from the military because her husband is retired from the U.S. Army. She says she's not concerned about being on the ballot with President Barack Obama -- despite Obama failing to win any of Oklahoma's 77 counties in 2008.

First-time candidate Markwayne Mullin will square off against a two-term state representative from Muskogee in a Republican primary runoff for the 2nd Congressional District seat in eastern Oklahoma.

Mullin finished first in a six-man GOP primary field on Tuesday, but the lead wasn't large enough to win the nomination outright. State Rep. George Faught finished second to force a head-to-head matchup in the Aug. 28 primary runoff election.

The two are vying to replace current U.S. Rep. Dan Boren, the only Democrat in Oklahoma's congressional delegation. Boren surprisingly announced last summer that he wouldn't seek a fifth term in office, and 10 political hopefuls lined up to fill his spot, including six Republicans, three Democrats and one independent.

Mullin had high name recognition because of advertising for his plumbing business.

Former prosecutor Rob Wallace will face Muskogee seed company owner Wayne Herriman in an August runoff for the Democratic nomination in Oklahoma's 2nd Congressional District.

Wallace led Tuesday's primary over Wayne Herriman, but not by enough to secure the nomination outright. Retired schoolteacher Earl Everett finished third and forced Herriman and Wallace into an Aug. 28 primary runoff.

Democrats are looking to maintain control of the district that was thrown open last summer when current U.S. Rep. Dan Boren surprisingly announced he wouldn't seek a fifth term in office. It's the only Democrat-held seat in Oklahoma's congressional delegation.

Despite a more than 2-to-1 voter registration advantage for Democrats, Republicans have enjoyed success in the district in recent years.

Republicans also will have a runoff.

Five-term incumbent Republican U.S. Rep. John Sullivan is fighting for his political life against a tea party-backed challenger in the race for the Tulsa-area congressional seat.

With half the 1st Congressional District precincts reporting unofficial results, political newcomer Jim Bridenstine had 53 percent of the vote over Sullivan. All of the uncounted votes were in Tulsa County, which is the home of both candidates.

In the past several weeks, Sullivan and Bridenstine have squabbled over who is the most conservative choice to represent the district that includes the city of Tulsa. Bridenstine is a Navy pilot who has tried to paint Sullivan as a career politician who has become out of touch with working-class Oklahomans because he voted for things like bailouts, debt ceiling increases and "government takeovers."

Elsewhere, the primary battle for the open 2nd Congressional District seat in eastern Oklahoma will continue with an August runoff.