Because he’s a moron and, more importantly, a bully. He thinks that escalating the aggressive pressuring and demands is the only way to prove that you’re the most important one in the room.

It’s also his fear response - see his handling of Canada and Europe forming closer economic ties in the wake of his tariff nonsense. He literally has no other tool in his toolbox. I’m just shocked that nobody sends to have ever pushed back against him and slapped him down before.