FILE - U.S. Attorney Rachael Rollins, of the Massachusetts District, addresses the media at the Moakley Federal Courthouse, Tuesday, May 24, 2022, in Boston. A watchdog agency is investigating whether Massachusetts’ top federal prosecutor violated a law that limits political activity by government workers for attending a political fundraiser that featured First Lady Jill Biden, according to an email reviewed by The Associated Press. (AP Photo/Charles Krupa)