.....That this country could once again break up via a revolt?
Yes. I see three main threads of thought: one is that it would take an external event (aka SHTF) such as currency collapse to force this. A second is that the Left will inevitably over reach and this will result in kicking off the backlash. The third scenario which many believe, and is commonly stated here at FR is that nothing will ever happen, the screws will tighten an everyone will grudgingly accept it.
Very few people suggest that the resistance will one day just kick things off. Even the groups planning for SHTF seem bound and determined not to be goaded into firing the first shot.
But one thing I have seen is more and more people coming to accept that we are not going to vote our way out of the leftist coercive super-state that now sits upon us. That's a difference from a 8 or 9 years ago.