SpaceX’s delay in getting its new Crew Dragon spacecraft to fly to the International Space Station has meant a longer stay on board for the pair of NASA astronauts that flew up on Boeing’s Starliner last summer but were left behind when it flew home without crew because of safety concerns.

There are already signs that Elon Musk’s marriage of convenience to President Donald Trump could be a fraught union. Musk turned more than a few heads by taking the lead on defeating a government spending bill last month — Trump doesn’t like being overshadowed — and undercutting a just-announced White House AI project last week.