More a thought experiment of sorts, mental masturbation, than anything current or about to occur.
The question is, how would you feel and what would you think today if one or multiple states, via the Democratoc Process (i.e. voting) choose to willfully leave the Union of the United States?
1. Do you feel the people of the States have the right to leave the Union if they vote democraticly to do so?
2. We, as in the U.S., almost universally have supported independence movements around the world in other countries, with some select (and usually US-geopolitical interest-based) exceptions. How would a State or States leaving the Union by democratic choice differ from our support for the will of the people in other Nations that we have supported?
3. Do you think there will ever come a day where the United States willingly divides itself up?