If Trump declares a “national emergency” and tries to build the wall without Congressional approval ... and the government is fully reopened next week ... then the Democrats will be walking all over Trump for two years.
Think about it:
The next Pelosi funding bill out of the House will include a provision that outlaws the use of Defense Dept. money for the wall. You can bank on this.
They can’t walk on him if he doesn’t sign their precious bills. What can they do, make ugly faces at him?
If Trump doesn't stand firm THIS time, there's no reason for anyone to believe he'll stand firm NEXT time.
I wouldn’t put it past Pelosi to attach that provision to EVERY bill the house passes.