And if they don't?If he attacks Greenland all USA based in Europe should be told to leave.
We are pretty powerless. We would look for negotiation and give them 6 months to leave fearing war. He would pick us off one country at a time.
Just like Hitler.
It sounds far fetched but we could not unify to stop him.
Italy and other right wing countries would probably welcome him. If we had Farage I'm sure we would.
