The Department of Government Efficiency, the brainchild of Elon Musk that upended Washington with its rapid-fire drive to slash thousands of federal jobs and cut costs, is effectively leaderless now that the billionaire and his deputy have stepped down,

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.