Line in the sand. If Trump trumps up an excuse to join, he is just another vile politician getting orders from up top. Tillerson, WSJ, etc. are paving the road for him to break his word to his supporters.
I think he's caving.
So, no, there is no Trump miracle.
The voters will either become more resolved for change or roll over and take the pounding. We'll see what happens in the '18 elections as to which way it will go.