But Saul said in an interview Friday afternoon that he would not leave his post, challenging the legality of the White House move to oust him. As the head of an independent agency whose leadership does not normally change with a new administration, Saul’s six-year term was supposed to last until January 2025. The White House said a recent Supreme Court ruling gives the president power to replace him. Saul disputed that. “I consider myself the term-protected Commissioner of Social Security,” he said, adding that he plans to be back at work on Monday morning, signing in remotely from his New York home. He called his ouster a “Friday Night Massacre.” “This was the first I or my deputy knew this was coming,” Saul said of the email he received from the White House Personnel Office Friday morning. “It was a bolt of lightning no one expected. And right now it’s left the agency in complete turmoil.”