Again, if the feds want to make a strong point, the best way to do that is to hold large employers to the law, and fine or arrest those who break the law. America intentionally had a porous border after the Bracero Program was stopped in 1964, otherwise crops wouldn't have been picked.
Or, of course, farm employers could have paid more for legal immigrants and citizens to do the work, but those coming through that porous border didn't cause trouble, they didn't cause field strikes.
People ask why, but for me the real question is who, as in who the hell is running this government if Trump is not. Aren't we in another Reagan time, when the President rambles on endlessly, but behind the scenes others are doing it all, including dropping off billions to foreign nations for no good reason at all.
Hope Melania is not doing what Nancy Reagan did.