"When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among..."
I mean, I really want us as a country to follow the agreement, but not so badly that I want to dissolve the entirety of the United States and legally unravel our entire country over it. This, IMO, is not Civil War-worthy.
Would anyone be under any illusion that an armed US retaliation against the Pacific Northwest joining Canada would be anything other than just an invasion.
"... it is the Right of the People to alter or to abolish it, and to institute new Government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness."