I would like to see someone take up the idea of Canamerimex Union in a movie for kicks -- that is, the idea of Canada, California and Mexico forming a union on the west coast (and maybe continuing down the east coast, with Canada bridging both coasts)
I actually liked that little detail and don't think it's too farfetched. In real life those two states are currently on opposite sides of the political spectrum, but (iirc) we don't actually know why the civil war started in the movie and it seemed careful to avoid any kind of left vs right ideology. California and Texas both have a rich history of calls for secession from the union, and both have heavyweight economies that could allow them to stand as their own countries. I think if a civil war did break out where both states disagreed with the Federal government, they'd be more likely than you think to form an alliance.
They're both ridiculously disenfranchised in the Senate.
They've both got significant antivax elements.
They've both got a very large Hispanic population and a portion of the Mexico border.
They're both large states with large economies and large governments; Whereas the Connecticut governor leading the Connecticut national guard is numerically incompetent at protesting the actions of the federal government, or has to overcome a bunch of coordination problems with other governors, they aren't and don't. Whereas Trump was free to seize the COVID pandemic supplies that Maryland bought and paid for, and redistribute them as political favors to red states, it would have been more difficult to do to a state with six times the population and a power center far from Washington. Any effort to oppressively regulate interstate trade is diminished somewhere you're dealing with large amounts of intrastate trade; Conversely, any impediments on trade with and travel to Mexico are going to be substantial issues in both Texas and California.