Trump is 100% Correct.
By entering the country illegally, the invaders have themselves made a statement to the effect that, they are not under the jurisdiction of the US.
And they'd be wrong. If they aren't under our jurisdiction how is it do you think we detain them and apply our laws to them? I hate to tell you, but that's our jurisdiction at work.
The Founding Fathers, ya' know, those Old Dead Heterosexual White Men, took pains to to make it crystal clear exactly what they meant so that only a fool could misinterpert their intent.
This is, of course why some politicians, lawyers, judges and all demonrats have so much trouble with the Constitution.
"The right of the people to keep and bear arms shall not be abridged."
What could they possibly mean?