Donald Trump is vowing to reduce wasteful federal spending by tapping two billionaires — Tesla CEO Elon Musk and entrepreneur Vivek Ramaswamy — to spearhead the initiative, which the president-elect is calling the Department of Government Efficiency, or DOGE. The appointments, raise a host of questions about the effort, including whether Musk and Ramaswamy will have the authority to make changes in federal outlays, given that Congress authorizes the nation's spending.