We’re at full employment already and have been for about three years. The natural rate of unemployment is roughly 4%, give or take half a percent on the downward side and a percent in the top side. Anybody who want a job and is capable of holding one has one, unless they refuse to move where the work is, or are seeking only the types of jobs that no longer exist in the economy in significant numbers.
So immigrants, no matter what the status of their paperwork, aren’t taking Jon’s from anyone. We desperately need new workers to grow the economy in the near future. Huge numbers of baby boomers are set to retire over the next decade. Labor markets are already tight and only going to get tighter.