

Greenland is hard. They’d likely do it. It’s a legal order under the War Powers Act. They would probably do it in a completely different way than going full explodey like they did with Iraq, but it would happen.
Now they could drag their feet, super telegraphing their moves, effectively giving Congress time to use the WPA to shut it down. But it’s not guaranteed by any means.
Canada would see mass desertions though. And Mexico or Panama are actually the most likely targets. The military would invade those places without a second thought.
That’s a useless show of disrespect. People we need in place would be fired for taking over one news cycle. Worse it could kick a purge of officers into high gear by giving ammunition to conservatives that the military has “gone rogue”.