You say you "understand the need for optimism, but..."
What do you propose to do about it?
All we can do is try to get these issues that call his legitimacy into question so that when the time comes there will be more people who will stand up, even if passively.
Personally, I think it will come to violence as the left feels they have the advantage and when they see power slipping from their grasp they will react as they have for the last 8 years. The difference is that this time they will have the power of the state behind them.
Waco, Texas, Elian Gonzales, and more will be repeated and much worse.
I hope it never happens but I just don’t see an easy way out.