I disagree. There is laws on the books, if enforced, we never would have gotten to this point. All the President had to do was direct ICE, the FBI and others to enforce said laws, deport illegals they pick up and prosecute employers hiring illegals. The employers would get the hint pretty quickly and the jobs attracting them here would dry up.
Why should he have to tell them to do their jobs? If they're not doing their jobs now, why would it make any difference for the President to tell them to do so?