Being isolationist or global imperialist implies articulating different strategies and values.

This is an administration that has neither of those.

They're not mutually exclusive

He changes his mind all the time. No decision will ever be final. It will change depending on what satisfies his whims at that very moment.

The enemy is both weak and strong.[1]

1: https://en.wikipedia.org/wiki/Ur-Fascism

It's a decent bet that they are truly foolish. I've said this before. If the administration isn't acting as agents of a hostile nation trying to destroy America from within and scuttle its global leadership, they're doing a great job acting like it.

Short of them just turning a nuke on a large city, I can't think of better ways to harm America without fomenting an actual uprising than what they're doing to us today.

Autarky requires imperialism to grab the resources needed to be fully isolationist. So it's really both, until they hit the tipping point to become fully isolated. But this is something else. This is just the anti-science ignorentsia coming together with the xenophobic white supremacists to screw America. They say Trump can't bring people together, but he's done a great job of uniting all the worst people in the country.