Not really, it's going to suck economically, but there's no real risk to our sovereignty.

The US couldn't even invade us if they wanted to, unless they were willing to glass the entire southern part of the country and I'm not even sure the missile commands would even be followed to be quite honest.

The unpopularity of a ground invasion would be staggering, you would literally see attacks INSIDE the US from their own citizens rebelling against it. Hell, you'd almost certainly see defection, deception, and mutiny inside the military itself from officers and soldiers who are friendly with Canada.

Watch all these troops stream across the border, get "captured" by Canadian troops because they know it will be safe until this shitshow is over. It will make the defections to Ukraine look like a ripple in a pond.