The day that any sitting US president even implies that they intend to use nuclear weapons against US citizenry is the day that every US politician will have to hop a flight to Israel, never to return. They will never be safe on US soil again after that.

I suggest you read a bit about what the realities of another civil war would really be like. If you legitimately believe that the left has any shot in terms of weaponry or physicality then you may as well punch your own clock right now.