Is Trump an isolationist? Can he pull the US out of its global commitments? He’s pulled out of TPP, the Paris Accords, and recently out of Syria.

Isolationism is a category of foreign policies institutionalized by leaders who assert that nations’ best interests are best served by keeping the affairs of other countries at a distance. One possible motivation for limiting international involvement is to avoid being drawn into dangerous and otherwise undesirable conflicts. There may also be a perceived benefit from avoiding international trade agreements or other mutual assistance pacts.[1]
https://en.wikipedia.org/wiki/Isolationism
The US has dominated the global stage since the end of WW2. But many Americans don’t really know or care much about the rest of the world. In fact, isolationism is deep in the country’s bones.
But is realistic for the US to turn its back on the rest of the world, especially given the global challenges we face? What do the isolationists/nationalists have to offer the problems like climate change?