President Donald Trump's threat to cancel Elon Musk's government contracts would have far-reaching implications, experts said.

The worried reaction within space and national security agencies highlights the risks of government’s exclusive dependence on SpaceX for crucial tasks, including classified missions.

The U.S. government relies on SpaceX to support NASA and other agencies, and the company has received more $20 billion in federal contracts for it. As Musk and Trump threaten to cut ties, here’s what that would mean for the U.