At present there is no such thing as US foreign policy, at least not at the presidential level. Trump has no worldview and no principles — we know that.
I have come to see Trump as merely a mendacious and narcissistic nincompoop. I’m guessing that policymakers in the world’s capitals are likely to have reached a similar conclusion. That is, they have learned not to take Trump seriously.
If there is a U.S. foreign policy, it comes from the permanent government of which Mattis is the preeminent representative. The permanent government thinks pretty much it has thought ever since the end of the Cold War — whether for better or worse ….