Trump knows that his base would be very unhappy if the government re-opened ad there was no funding for a wall. But can you imagine how the left core of the Democratic Party would react if Schumer and or Nancy the nut actually agreed to fund a wall. Its a stalemate. The only real solution is for Trump as Commander in Chief to order the Army Corp of Engineers to build the wall and use existing Pentagon funds for its construction. Withdraw from just some of the debilitating foreign entanglements and plenty of money will be avaiable.
This is a perfect Kobayashi Maru scenario.