He declares a state of emergency to build the wall and sign a budget to reopen the Government, then Congress challenges the use and definition to the courts, who can rule it an abuse of power and without merit. Then Trump gets to pander to his dumbass base by saying he tried to do something but the "liberal courts" were against his vague idea that he's lied about, repeatedly. Theater of the highest order.

End of.

If it isn't challenged, watch the procession of Joint Chiefs resign. OR watch him use this as an excuse to quit.