I probably have not worded myself properly. I do not mean to say decreasing the pool of workers will mean even more overall workers will be demanded, but rather there is now less competition for the leftover workers to go up against. That in and of itself can never be a bad thing for the leftover workers.
Even if the number of jobs is not fixed, can go up, goes down; less competition for the jobs is still never a bad thing. I do not believe Trump or any of his policies rules out increasing legal immigration if the situation calls for it. It may have read that way, but I was just being blunt before.