Honestly, if Trump wasn't an idiot, I'd be on board with this. Setting national pride aside, you might be able to negotiate changes to US federal laws and programs that would bring them more in line with Canadas, along with some sort of 10-20 year sunset period in which existing Canadian programs would continue to run. Then we could do a national merger.

But I know he's picturing an invasion, because he doesn't give a shit about nuance and compromise.