Good point. There's no deal to be had with Trumplandia.
Maybe the northeast, the west coast and Canada could agree on an arrangement of that sort. Throw in the UK and Australia. That's a 250-300m economic bloc. Heartland perhaps?
I didn't agree with all of the territories. Nevada, Arizona, Colorado and New Mexico would probably want to be part of the Pacific territory. Alaska would become a part of Canada. North Mountain and West Heartland (the Dakotas and Nebraska) would fit together okay.