Musk said he had "done enough" and that he will step away from the Department of Government Efficiency (DOGE), the inner-government group that has slashed federal budgets and workforces. As he prepared his goodbyes, Newsweek looked back at Musk's time in government and asked experts on whether he will have a lasting impact.

As Elon Musk departs Washington, his mood resembles his Cybertruck: ugly and adolescent.

Mr. Musk’s drug consumption went well beyond occasional use. He told people he was taking so much ketamine, a powerful anesthetic, that it was affecting his bladder, a known effect of chronic use.