Maria Chapa Lopez resigns as U.S. Attorney for Tampa The move comes after the Biden administration asked that Trump-appointed federal prosecutors leave office. Â Â Updated Feb. 27 TAMPA â Maria Chapa Lopez, who has served as the U.S. Attorney for the Tampa-based Middle District of Florida since 2018, announced her resignation late Friday, along with other top federal prosecutors nationwide. The move comes weeks after Acting Attorney General Monty Wilkinson asked all 56 U.S. Attorneys appointed by former President Donald Trump to resign. In recent years it has become common for U.S. Attorneys appointed by Republican or Democratic chief executives to resign when a president of the other party takes office.