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.

U.S. President-elect Donald Trump on Tuesday named Elon Musk and former Republican presidential candidate Vivek Ramaswamy to lead a newly created Department of Government Efficiency, rewarding two of Trump's well known supporters from the private sector.

Will the mercurial tech mogul put his thumb on the scale to help his own companies, or will he push for a broader deregulatory agenda?