California Democratic Sen. Dianne Feinstein has decided not to seek her state party’s endorsement, calling for party unity ahead of the November election.

Feinstein and state Sen. Kevin de Léon, a fellow Democrat, advanced to the general election after finishing first and second respectively in the state’s top-two primary last month. The four-term incumbent wrote an email Tuesday addressed to the party’s executive board members — that also appeared to also be sent to her campaign fundraising list — calling for no formal endorsement. For the first time in nearly 30 years, Feinstein did not win the party’s backing prior to the June 5 primary.

“Republicans would like nothing more than to see Democrats fighting each other, and a formal endorsement in our race will divide our party at the exact time we need to come together and focus on the general election,” she wrote. “You can help prevent that by voting no endorsement.”

California Democratic Party leaders will meet July 13-15 for their executive board meeting in Oakland, where they are expected to determine if the party will make a post-primary endorsement.

Feinstein is still on the party endorsement ballot, according a memo circulated to party officials Tuesday and obtained by Roll Call. The state party conducted a drawing to determine the ballot order for the endorsement, with Feinstein’s name appearing first ahead of de Léon’s. The ballot will also include the option not to endorse either candidate.