The Department of Defense is among several U.S. federal agencies pushing back against the email, which was sent out Saturday.

In a recent interview, Defense Secretary Pete Hegseth said he would soon welcome Elon Musk to do a review of the Pentagon's massive budget.

The new Pentagon chief got a look at Guantánamo Bay’s most infamous inmate in his recent visit to the wartime prison.

Elon Musk sent an email to every federal worker asking them to explain their accomplishments. He got sued instead.

Secretary of Defense Pete Hegseth posted a picture to X of what appears to be a tax notice showing he owes more than $33,000 ...

Secretary of Defense Pete Hegseth admitted Sunday that he’d fired top military lawyers so that Donald Trump’s administration ...

The email Elon Musk directed to be sent to all federal employees is getting pushback from President Donald Trump's appointed ...

Hegseth, 44, demanded a proposal that would include annual 8% cuts to the Pentagon’s roughly $850 billion budget, according ...

Secretary of Defense Pete Hegseth said Elon Musk was "welcome" to the Pentagon. How will he approach its deep budget problems ...

Defense Secretary Pete Hegseth verified that staffers from Elon Musk’s Department of Government Efficiency are working in the ...

U.S. Defense Secretary Pete Hegseth said on Tuesday he wanted to increase overall U.S. defense spending and played down ...

Elon Musk's deadline for federal workers to justify their jobs is fast approaching. Follow Newsweek's live blog for updates.