Rep. Brad Sherman (D-Calif.) defeated fellow Democratic Rep. Howard Berman in their member-vs.-member match-up.

It was a nasty campaign, with the two lawmakers almost coming to blows during a debate and having to be separated by a police officer.

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Sherman led with 40 percent of the vote to Berman's 20 percent. He was favored to win. Berman conceded after The Associated Press called the race.

The redistricting process put the two men in the same seat, which contained much of Sherman's old territory. Under California's new primary system, the top two vote-getters, regardless of party, move on to the general election.

Democratic leadership indicated a preference for Berman, with Rep. Steny Hoyer (D-Md.), the No. 2 in leadership, endorsing him. Berman also had the endorsement of prominent Republicans like Sens. John McCainJohn Sidney McCainRubio asks Army to kick out West Point grad with pro-communist posts The VA's woes cannot be pinned on any singular administration Overnight Defense: Mattis offers support for Iran deal | McCain blocks nominees over Afghanistan strategy | Trump, Tillerson spilt raises new questions about N. Korea policy MORE (R-Ariz.) and Lindsey GrahamLindsey Olin GrahamDurbin: I had 'nothing to do' with Curbelo snub Republicans jockey for position on immigration Overnight Health Care: House passes 20-week abortion ban | GOP gives ground over ObamaCare fix | Price exit sets off speculation over replacement MORE (R-S.C.), who cited his work on the House Foreign Affairs Committee.

Sherman, meanwhile, had the support of former President Clinton.

—This story was updated at 5:28 a.m.