I have said several times peaceful secession is the only alternative to civil war.
New England and the Acela corridor down to Occupied Northern Virginia would go. Hawaii and the Left coast (not the whole states, just the coastal strips) would go. Some city states like Miami and Chicago would be cut loose. 95% of the liberal arts faculty and a large percentage of college administrators would need to be expelled like modern day loyalists.
The rest of us would be quite happy. Wed probably have to build some more walls to keep them from sneaking back in.
The rest of us would likely have to split into two or three separate entities in order to be quite happy.
Indeed we would.