If there is a “civil war,” it will be a lopsided one for a variety of reasons. Namely, the other side will be mostly women, minorities, anarchists, “trans girls” and PMCs who are afraid of firearms and who are literally surrounded in their urban shitholes and geographically separated on the coasts. There are a lot of immigrants who vote for the Democrats who don’t really have a dog in the fight.
Personally, I don’t see it coming to that. There might not be a “civil war.” It is more likely that after a long period of gridlock and polarization that the other side simply loses and collapses. Inflation is one thing that I can see decisively breaking the stalemate. I don’t think either side wants to fight it out.