The pardon power in the Constitution is straightforward: “The President shall have Power to Grant Reprieves and Pardons for Offences against the United States, except in Cases of Impeachment.” Worse, however, if the president pardons himself for violations of law, the pardon itself may establish a continuing violation of law by obstructing justice, i.e. the interference with the orderly administration of law and justice. Trump has two choices, resign and hope a president Pence gives him a pardon, or serve out the rest of his term and hope a president Biden pardons him.