The Democrats will overplay their hand, just like they did on Justice Kavanaugh and just like they did on Obamacare reform.
The Democrats are supposing (probably correctly) that if they sit and wait Trump out the mounting pressure on him to reopen the government that the public feels he is holding hostage will be too great and he will crack and capitulate to them.
Idiotic thinking on their part, He won't capitulate; he'll declare a national emergency. Then, the Dems will get NOTHING that they want with regard to the Dreamers, family reunification procedures, etc.
If he decides to go the national emergency route they figure given that a 60-40 majority don’t want the wall built he will do more political harm than good to himself and they’d be happy with that too.
I disagree that the mere action of declaring an emergency to get the wall built will tick of swing voters like you are projecting. This is a flashpoint issue with liberals (who would never vote to reelect Trump in a million years anyway) and with conservatives (who by & large want the wall!).
He’d get his wall and then be crushed in 2020 worse than he probably already will. There isn’t much Trump can do to win in this game... if the public doesn’t suddenly blame the Democrats or love the wall then he is screwed. End of story. They had their golden opportunity before January 3rd... the GOP blew it.
He can win by making a reasonable proposal (just as he did on Saturday), giving the Dems a chance to cooperate, and then if they refuse to cooperate, concurrently declaring an emergency and reopening the government. Public opinion would be split pretty close to 50/50 under such a scenario. Politically speaking, it'd be a "push."
Morgan Wallen is a piece of garbage.