Why doesn’t Congress make it a law that anyone captured while crossing the border illegally will be immediately deported to Mexico or Canada and no one will be allowed in at a border crossing claiming asylum if they had not already been vetted at the US embassy or alternatively placed in a detention while an expedited review of their claim was evaluated and if turned down immediately be repatriated to their country of origin.
I realize the details of such a law would need to be worked out and some of the people coming here who are drug or human smugglers would need to spend a few decades in Federal Pridon before being deported.