All 3 would be very much Safe D and politically similar to Vermont (though Manitoba would probably be a few points more Dem) if shifted into the US today. Its important to note that an areas political culture changes massively as you cross the US/Canada border. Its harder to answer what happens though if you are talking about a scenario where they were shifted decades or as much as a century and a half ago, since the political culture would have developed differently in that case.
It's pretty clear Alberta would vote like one of the oil states if it came in after WWI or something and US levels of social conservatism were politically acceptable for generations.
Hmmm... turning to eastern Canada, if Quebec had been a US state since WWI (lol), would it have an total abortion trigger ban like Louisiana?
Depends on whether or not the Quiet Revolution happened ITTL.
