Although Jacob Wohl tweeted:
“It’s pretty clear that President Trump can’t redirect DOD money to build the wall. Congress sets the defense budget, not the Executive.”
I have no idea if that’s true. e
“To date, there is no plan to build sections of the wall. However, Congress has provided options under Title 10 U.S. Code that could permit the Department of Defense to fund border barrier projects, such as in support of counter drug operations or national emergencies,” Pentagon spokesman Army Lt. Col. Jamie Davis said.
https://www.breitbart.com/politics/2018/12/12/pentagon-border-barrier-military/