What’s he going to do, cancel their mission in space? The whole thing is programmed, they’ll just come home like always. Do you really think that if Trump screamed “I hate them! Leave them in space to die!” that the NASA operatives would just go along with it - “Sorry guys, the boss says No. It was nice knowing you?”

Of course not. They would completely ignore that order, and bring them home anyway. And if somehow that wasn’t possible, we aren’t the only people in space. It would be a great propaganda coup for some other country to go up and rescue them instead.