Secession won't happen because we're not a red state/blue state country. We're a red rural/blue urban/purple suburban country.
One detail that I found interesting in this article was choking the cities by preventing the delivery of food. Seems this would be very easy to do and like the article stated, most Americans are only about 9 meals away from not having anything to eat.
Another detail I fund interesting is that it won't be a simple, 2-sided conservative/liberal civil war. It'll be a whole bunch of armed groups that cross the political spectrum all vying for power.
Secession WILL happen because if a state’s citizens votes for secession then the whole ENTIRE state secedes. That’s how it works.