Maybe constitutional bumbler might be a better picture. He’s not coming at this thing with theory, but with what he believes to be utterly practical.
FOR WHATEVER IT IS WORTH HOWEVER, I haven’t seen Trump keep on doubling down on the more constitutionally dubious things (like horning into state law with Federal). Maybe his advisors are like, er Donald, we’d better not go down that road, how about letting it die?
He just says whatever is in his mind at the moment without trying to connect it to something he's said before or had been told in the past.