It's all there, right in the document the president and each senator swore an oath before God to support. The president serves for four years. Nothing in the Constitution says, implies, or suggests that the president's duties are abrogated, suspended, stopped, stripped away or limited in the fourth year of his term — or her term, should a woman be elected. Obama's oath of office requires him to nominate a Supreme Court justice. It's that simple: he shall nominate someone to fill the seat that Antonin Scalia's death left open. Last week, Obama kept his oath and sent the name of Judge Merrick Garland to the Senate, to sit on the nation's highest court.