President-elect Donald Trump named tech billionaire Elon Musk and conservative activist Vivek Ramaswamy on Tuesday to head up a new Department of Government Efficiency, fulfilling a campaign pledge to give Musk sweeping oversight of government spending.

President-elect Trump has tapped tech entrepreneurs Elon Musk and Vivek Ramaswamy to lead an advisory group focused on cutting federal spending and reducing the size of the government. Trump announced Tuesday that Musk and Ramaswamy would lead his “Department of Government Efficiency” (DOGE),