Based on your definition - "refusing to employ people from the other party, DDOS attacks" - I would say we're already sort of there. People do get fired/reject

Based on your definition - "refusing to employ people from the other party, DDOS attacks" - I would say we're already sort of there. People do get fired/rejected for their political views. Which, and don't take my word for it, I believe is not illegal. While religious beliefs are protected, political ones are not. Again, I just read that somewhere, so, to take with a grain of salt. As to an actual civil war, I don't see it happening. A lot of people are pissed and outraged, but IMHO this is nowhere near the level that triggers a civil war. Let's face it, people in America still enjoy a level of comfort most the the world can only dream of.