Since NASA has become increasingly reliant on Elon Musk’s SpaceX for is missions, people are wondering what the future of U.S. space travel might look like amid his spat with the president.

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.

At a bill signing event at the White House, Trump invoked his high-profile former aide, saying "Now I know why Elon doesn't like me so much."