ENCINO, Calif. — In yet another unprecedented moment in California House races this cycle, 10 Republican members of the state’s Congressional delegation have endorsed Democratic Rep. Howard Berman.

The Foreign Affairs ranking member is running in a highly competitive race against fellow Democratic Rep. Brad Sherman in a San Fernando Valley district that the two were merged into during redistricting. The endorsements are part of Berman’s outreach across the political spectrum in a district where Republicans could make up about a quarter of the vote in November.

According to a release the Berman campaign will roll out today, the Republicans endorsing him are: Reps. David Dreier, Wally Herger, Dan Lungren, Elton Gallegly, Buck McKeon, Ed Royce, Jerry Lewis, Ken Calvert, Mary Bono Mack and Darrell Issa.

The announcement comes on the heels of endorsements from GOP Sens. John McCain (Ariz.) and Lindsey Graham (S.C.) and Sen. Joe Lieberman (I-Conn.). Berman is also backed by 24 of the 26 Democratic members of the California delegation who have endorsed, as well as California Democratic Sens. Dianne Feinstein and Barbara Boxer.

“Republicans in Congress know that Howard Berman is one of the few Democrats we can partner with to advance bipartisan, commonsense legislation to deliver meaningful results for all of our constituents,” McKeon said in a statement. “Howard’s opponent, Brad Sherman, has not demonstrated this type of leadership and his poor legislative record reflects this. Members of Sherman’s party don’t view him as a serious player shaping public policy, and neither do Republicans.”

Sherman and Berman advanced to the general election after finishing first and second, respectively, in California’s June “jungle” primary.