Right now, the [divided] United States is in a state of "cold civil war":
The red states v. the blue states.
It has yet to "go from cold to hot".
But that fragile peace won't last forever.
Sooner or later, there is going to be a "Fort Sumter moment".
An event, a line that is crossed, from which there is no going back.
And then all hell is gonna break loose.