What has he done? The very fact that it has reached these proportions demonstrates that he has done little and is just reacting to a de facto reality. He has no choice but to deal with it. Unfortunately, he has chosen to solve the problem by legalizing the illegals. Reagan did it in 1986 and it didn't work. It just exacerbated the problem.
No doubt you would admit that Reagan's failure to build a fence in 1986 and capitulation on amnesty indicates that Reagan was not a REAL conservative and was in bed with the Mexican Presidente.