FILE - In this June 26, 2018, file photo, then-Suffolk County District Attorney Democratic candidate Rachael Rollins speaks during a forum in Boston. A watchdog agency is investigating whether Massachusetts' top federal prosecutor, Rachael Rollins, 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/Steven Senne, File)