A bipartisan group of former officials and legal heavyweights, including two former federal judges, asked the California bar association Monday to investigate the conduct of John Eastman, the adviser to then-President Trump who mapped out a legal strategy to overturn the 2020 election results.

The complaint, also signed by two former justices of the California Supreme Court, cites Eastman’s work in election challenges rejected by the Supreme Court and his speech at a Jan. 6 rally in Washington before a pro-Trump mob stormed the Capitol. But the 24-page memo centers on Eastman’s alleged role in pressing Vice President Pence not to count electoral votes on Jan. 6 and certify President Biden as the winner.

“The available evidence supports a strong case that the State Bar should investigate whether, in the course of representing Mr. Trump, Mr. Eastman violated his ethical obligations as an attorney by filing frivolous claims, making false statements and engaging in deceptive conduct,” the letter said. “There is also a strong basis to investigate whether Mr. Eastman assisted in unlawful actions by his client, Mr. Trump,” to overturn the results of a legitimate election.

The complaint was written on behalf of the States United Democracy Center, a nonpartisan organization promoting election integrity co-chaired by former New Jersey Gov. Christie Todd Whitman, a Republican, and Norman Eisen, who served in the Obama White House and worked with House Democrats during the first Trump impeachment.