...That would be moronic.
What's moronic are people who think complex problems are solved with sound bites and simplistic solutions.
There are reasons why the illegal immigration problem has been a problem further back than Reagan (that's over 36 years for math-challenged morons.

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I fully support fixing the problem. We, as a nation should enforce our laws. As humanitarians, we should enforce the laws because illegals are often exploited by greedy assholes.....which is one of the main reasons why the problem hasn't been fixed.
"The Wall" is a white elephant waiting to be born. George S. Patton once stated
"Fixed fortifications are monuments to man's stupidity" and he is correct. Factor in both that single-layer defences are equally stupid and the high cost of construction, maintenance and staffing when cheaper, more effective solutions remain to be applied. Specifically, fixing the problem(s) on why people come to the US illegally. The number one reason is jobs. Solution? Arrest, charge and imprison anyone convicted of employing illegal aliens. Do the same to anyone who rents to or otherwise harbors illegals. After a few employers are arrested and sent to jail, the jobs will dry up.
Such a solution requires a means for identify prospective employees as being legal to work in the US. E-verify is good, but it could use some beefing up and enforcement.