Senate parliamentarian Elizabeth MacDonough works beside then-Vice President Mike Pence earlier this year during the certification of 2020 Electoral College ballots, in the House chamber of the U.S. Capitol.

In this Jan. 6, 2021, photo, Senate Parliamentarian Elizabeth MacDonough, second from left, works beside Vice President Mike Pence during the certification of Electoral College ballots in the presidential election, in the House chamber at the Capitol in Washington. Shortly afterward, the Capitol was stormed by rioters determined to disrupt the certification. MacDonough has guided the Senate through two impeachment trials, vexed Democrats and Republicans alike with parliamentary opinions and helped rescue Electoral College certificates from a pro-Trump mob ransacking the Capitol. (AP Photo/J. Scott Applewhite)