Funny thing: all of this can be sidestepped pretty easily, as I show in post #25.
All Trump has to do to prep the ground is two things: (a) tweet out the real numbers for the illegal population, as it's likely closer to 30 Million than the always-constant "11 Million" the press and government agencies say; and (b) get a governor, preferably of a southern border-state, to declare a state of emergency deploying their National Guard and demanding that the President uphold Article 4, Section 4.
Neither of these are strictly necessary, but they cut the legs out of a lot of the objections that could be made if the president were to act on his own. The Constitution should be enough of a justification to act, but the Judiciary has so usurped power and authority from the Constitution that they've convinced whole generations that the Constitution is whatever the Supreme Court says it is
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“...but the Judiciary has so usurped power and authority from the Constitution..”
A few impeachments and public executions would tamp down their ardor.