Bill McSwain, 52, announced Monday that he will be running for governor in Pennsylvania. HARRISBURG, Pa - Bill McSwain, top federal prosecutor in Philadelphia under former President Donald Trump, will run for governor, he announced Monday, joining a crowded Republican field that may still yet get bigger.McSwain's announcement was not a surprise.He had written to Trump in July, seeking the former president's endorsement for governor and, before that, had told party figures that he intended to run.It is his first run for public office.McSwain, 52, lives in Chester County and went back to private law practice after more than three years as the U.S.