If we had the wall, illegal immigration drops 99% meaning birthright citizens also drop 99%. Is it still a problem? Of course. Would it be as serious an impact to society as it is now? I don’t think so.
I hope that PDJT addresses the children born here of foreign parents on temporary visas as well. Some countries, like China, participate in a big scam on us by sending pregnant women here very soon before giving birth so their babies can be American citizens. Then the whole chain migration thing can happen.