President Donald Trump faces the challenge of convincing Republican senators, global investors, voters and even Elon Musk that he won’t bury the federal government in debt with his multitrillion-dollar tax breaks package.

Elon Musk said he expected to "remain a friend and an advisor" to President Donald Trump as his time as a special government employee ends.

An Oval Office news conference signaled an end to a remarkable period of upheaval across the federal bureaucracy, supervised by Mr. Musk and his cost-cutting initiative.