President Donald Trump bid farewell to Elon Musk in the Oval Office. The billionaire entrepreneur is ending his work in the administration on Friday.

In an Oval Office send-off capping off his role with the Trump administration, Elon Musk did not respond when asked about a New York Times report alleging he's a near-daily user of ketamine.

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.