The billionaire has made clear he is frustrated with the obstacles he encountered as he tried to upend the federal ...

Elon Musk's time in Washington, D.C., was an inferno. He was appointed the head of the Department of Government Efficiency ...

The mercurial billionaire fell short of his promise to cut government spending by $2 trillion, clashed with senior administration officials and left the capital without speaking to the president.

Elon Musk is leaving his government role as a top adviser to President Donald Trump after spearheading efforts with the ...