A wall is a complete waste of time and money. Most drugs and other illegal stuff comes through legal ports of entry. And if you want to come to the US just fly in and never leave — no fuss no muss.
There are no mobs of people flooding over the boarder. It’s a reverse problem. Famers and other industries don’t have enough workers to do the jobs that American citzens won’t do since all this border hysteria for political purposes was launched by lying Don.