Canada

I actually wasn't aware that there would be pushback from Washington on this. The separatists and the Premier constantly go on about how they'll go to the Americans if Canada won't let them build a pipeline through BC (even though the Trudeau government literally bought them a pipeline a few years ago).

I imagine their plan is to ship oil to the Gulf States for refining, and that's it. They probably also assume they'll get all of the benefits of being American, which I presume mostly involves second amendment rights.

Wexit would be Brexit... but with a landlocked country with an economy a tiny fraction of the size based entirely on oil, who unlike the UK (who is going it alone) are subsumed into a larger country that wants nothing to do with the people and wouldn't even give them a vote. Oh and good luck with all the indigenous peoples, they are famously even-tempered about having their land occupied and will surely not interrupt any economic infrastructure, and that's assuming the Supreme Court doesn't stand on rulings that bar Alberta from leaving and taking unceded land with them.

In a great twist of irony, the indigenous peoples may save Canada, and I hope it ultimately brings all Canadians closer together, and they get the respect they deserve.