***first there is secession of some red states.***
Why not a secession county by county. Many Blue states are actually red with blue cities dominating the political structure.
How many of us would just love to build a fortification around a blue city to keep the rif-raf in, much like the human body builds a wall around a pustule till the pustule destroys itself.
I hear you, but the only way for a county to secede would be to break off a group of counties from a state. See the formation of West Virgina as an example: Link here.