Several high-ranking federal election officials attended a summit last week at which prominent figures who worked to overturn Donald Trump’s loss in the 2020 election pressed the president to declare a national emergency to take over this year’s midterms.

According to videos, photos and social media posts reviewed by ProPublica, the meeting’s participants included Kurt Olsen, a White House lawyer charged with reinvestigating the 2020 election, and Heather Honey, the Department of Homeland Security official in charge of election integrity. The event was convened by Michael Flynn, Trump’s former national security adviser, and attended by Cleta Mitchell, who directs the Election Integrity Network, a group that has spread false claims about election fraud and noncitizen voting.

Election experts say that the meeting reflects an intensifying push to persuade Trump to take unprecedented actions to affect the vote in November. Courts have largely blocked his efforts to reshape elections through an executive order, and legislation has stalled in Congress that would mandate strict voter ID requirements across the country.