The role of Elon Musk's SpaceX in an ambitious new U.S. missile defense system is in question following the dramatic feud last week between the billionaire entrepreneur and President Donald Trump, according to three people familiar with the project.

A new poll finds Elon Musk has lost some of his luster with Republicans since his public falling-out with President Donald Trump.

On the political stage of Donald Trump's ever-expanding theatre, the Elon Musk affair began like a swaggering bromance destined for longevity - two outsider moguls, both mythmakers in their own right,

Musk’s rare public expression of regret suggests he is trying to defuse tensions after Trump threatened to retaliate against his companies during their feud.

Elon Musk issued his strongest sign of contrition yet over his handling of the dramatic break with Donald Trump, days after a call with two of the president’s top allies.

After a rift between President Trump and billionaire backer Elon Musk erupted publicly, Washington was assessing the damage to Trump's policy priorities and Musk's businesses.

The Tesla CEO practically lived in a guest house at Trump's Florida estate before the inauguration, but in recent months, their visits to Mar-a-Lago grew less frequent