President Trump’s decision to pull a close associate of Elon Musk’s out of the running to run NASA helped doom an ...

President Trump must contend with the wrath of a wealthy ex-ally who may seek to undermine him politically. Mr. Trump has ...

For all the insults that Mr. Musk and Mr. Trump traded on Thursday, don’t be surprised if they make up again days from now.

Their battle comes at a moment when Mr. Trump is engaged in a delicate dance on Capitol Hill to get his signature legislation ...

Taking to their respective social media platforms, Trump threatened to cut Musk’s government contracts, while Musk said Trump ...

The stock has been on a roller coaster ever since Mr. Trump’s election. The shares are down about 13 percent this week.

A timeline of the praises and insults that President Trump and Elon Musk have lobbed at each other shows how their volatile ...

Since the election, Elon Musk had largely appeared inseparable from the president, helping to reshape government and root out ...

The relationship between Mr. Trump and tech industry power brokers was built on money and the promise of deregulation, with ...

Readers discuss the public feud between the president and his onetime ally. Also: China’s boom and America’s promise.

The clash between the president and Teslas C.E.O. wiped billions off the electric vehicle maker’s market capitalization.

The speed of the fallout was breathtaking, with President Trump celebrating Elon Musk during an Oval Office farewell just ...