If the Senate convicted, things would change. For one thing, I'm confident the military would not consider an impeached and convicted president as its commander

If the Senate convicted, things would change. For one thing, I'm confident the military would not consider an impeached and convicted president as its commander in chief. And the prospect of the consequences of continuing to side with such a one would largely evaporate the availability of the administrative apparatus. Civil war would be a possible result, sure. But I disagree that such a Congress would simply be ignored and that ignoring it could be done while maintaining the means of continuing power.