Subject: Re: They say they don't want open borders...
5) Find somewhere else for them to wait. That was Trump's "Remain in Mexico" solution - basically, find another country that's willing to suffer all the adverse consequences to people stuck in limbo that we're unwilling to stomach. Hard to do....Mexico's not going to agree to that again, and there aren't really any other candidates.
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6) Beef up border security seriously by an order of magnitude if necessary dare I say wall AND ensure all but a tiny fraction stay on their side of the wall until and unless the US opens the door for them in some limitied and measured way. And the hidden message to Mexico, if you let them into your country, you are going to be stuck with most of them.