I’m afraid you’re wrong here actually. Being arbitrary and mercurial means no one will risk investing in the US, as policies may be created or undone at any moment. The only way this goes away is simply that he goes away. The risk is what is creating the certainty here.

And how do you picture the Danish Foreign Minister getting to this air base that is the only one in the region, and getting past the American security?

The problem is they will be landing at an airport controlled by the US.