Former New Jersey Gov. Chris Christie was a surprise guest Tuesday as the U.S. Supreme Court heard arguments in the “Bridgegate” corruption case. The Republican sat directly in front of Bridget Kelly, his former aide who he fired in the wake of the scandal and who was later convicted. Christie wasn’t charged, but several witnesses at the 2016 trial contradicted his account of when he knew about the plan to create traffic jams near the bridge to punish a mayor who had declined to endorse his 2013 reelection. Kelly and codefendant Bill Baroni say the government misapplied the law when it charged them.