It’s interesting to think about. If the blue states, which are not contiguous, seceded and joined together as a nation, they’d be scattered groups of states and easily defeated. But if they formed a union with Canada (the NAU?), then at least the territory of the NAU would be contiguous because most of the blue clumps are adjacent to Canada: the NE states, west coast states, Minnesota, probably Michigan, and then Illinois, which might be isolated depending on how Wisconsin would go. Colorado and New Mexico would still be isolated. Maybe they could defeat Arizona and be linked up with the west coast.

Then there’d be the issue of the US capital being D.C which along with its surroundings is overwhelmingly blue, so it would just have to be taken as part of the NE section, and Trumpistan would have to have its capital elsewhere.

Once trump cuts off all government funding from the blue states as he keeps threatening to do, maybe they could join Canada as provinces. It should be win-win considering the blue states contribute more to the federal govt. than they receive from it; while red states receive more than they contribute. So they would make Canada stronger and Trumpistan weaker. Trump wants to expand US lands to impress his idol putin and be like him, but instead he would lose territory.