For the last few months, the United States has confronted an unsustainable rush of people attempting to illegally cross our southern border.

In March, President Biden put Vice President Kamala Harris in charge of dealing with the crisis. But Harris is in over her head. Even with an extremely friendly media, the veep often gets flustered and angry when pressed on the details — and the number of newcomers has only grown since Harris was tasked with stanching the flow.

Finally, last week, Harris went to Guatemala and pleaded: “Do not come. The United States will continue to enforce our laws and secure our border.”

But the message was too little, too late. For months, Team Biden had telegraphed that it wouldn’t, in fact, enforce our laws or secure our border. Migrants came en masse, because they believed Team Biden had invited them.

This isn’t some right-wing talking point.

In March, El Salvadoran President Nayib Bukele said that when candidates Biden and Harris vowed in the Democratic primary to give illegal immigrants free health care, it was an...............