People keep talking about "Federalizing the National Guard" and now you've got other States pledging their NG to Texas in defiance of the Supreme Court (see image).
It's not even a new civil war. The last civil war only ended technically. In reality it went cold and has still been being waged all this time. It turned from a war of the rural South against the industrialised north. To a war on the industrialized from the rural.