A federal judge is forcing a conservative lawyer who had worked for then-President Donald Trump before the January 6 insurrection to respond to a House select committee subpoena of Chapman University for his emails — setting congressional investigators up to receive access to information they’ve wanted for months but had not been able to get.

Federal Judge David Carter in Santa Ana, California, on Monday pinned down exactly when law professor John Eastman was at work for his client, Trump, as he devised a plan to overturn the 2020 election result.