Within minutes of issuing such an executive order, a Federal Judge would order a halt to any wall construction. Perhaps to protect the migration patterns of desert tortoises or butterflies.
And the Jacksonian response? “Judge __xx___ has made his/her ruling- now let him/her enforce it”.
I think maybe you’re the only Freeper left who “gets it”. Trump could have accomplished a hell of a lot the he didn’t because he let the swamp creatures usurp all the power we gave him. To paraphrase Obama, you don’t go to a knife fight with Marquis of Queensbury rules.