If the Canadian provinces became US states, then the House and Senate battles get quite interesting, as the Cabinet Ministers and most important MPs start running for the Senate and House of Representatives, knowing there are far fewer seats available...I'm sure you'd see a good mixture of Democrats and Republicans (and perhaps the odd Independent, like Jack Layton in the downtown Toronto House district) in Congress from the former Canadian provinces in the end, especially in the House, even if they all vote Democratic in the Presidential race...
I was hoping Ontario remains as a rump of Canada. We'll gladly take Manitoba, BC, etc.