A report in a Mexican newspaper earlier this month suggested that, as part of a mooted NAFTA re-negotiation, the Trump administration may offer to help Mexico bulk up border security along its southern frontier with Guatemala.

The report is unconfirmed; calls and emails to the Trump administration from THE WEEKLY STANDARD went unanswered, and the new president’s reported adviser on all things Mexico declined to comment. However, it’s a notion that makes a good deal of sense. Trump’s opponents delight in pointing out that illegal Mexican immigration into the United States has declined vastly in recent years. But not only is that argument overstated, it’s also a non sequitur: Last year, more than 43,000 families and 18,000 unaccompanied minors from Guatemala, El Salvador, and Honduras were caught at the U.S.-Mexican border, notes the Financial Times. It’s Central Americans passing through Mexico who now make up a large percentage of illegal migrants into the United States. In 2014, for the first time ever, more non-Mexicans than Mexican nationals were detained trying to enter the United States at our southern border.