Defense Secretary Pete Hegseth said the Pentagon will welcome Elon Musk’s Department of Government Efficiency to address redundancies and waste in the Department of Defense—a comment that comes as controversy surrounds Musk’s powerful agency and questions of what it can and cannot do in different departments.

The shift in opinion on Musk comes amid concerns about how much power the unelected billionaire has in how the country is run.

Congressional Republicans are publicly projecting that they’re in lockstep with the way President Donald Trump and Elon Musk are attempting to slash the federal workforce. But under the surface, some GOP lawmakers are growing concerned by the effort to usurp Congress’s control of the federal purse strings.