You can’t say you weren’t warned: At the upcoming presidential debate on June 27, Donald Trump plans to highlight a handful of horrific murders—allegedly by undocumented migrants—and blame them on President Biden. We know this because Trump told us so right on his Truth Social feed.

“We have a new Biden Migrant Killing—it’s only going to get worse, and it’s all Crooked Joe Biden’s fault,” Trump seethed, referring to the horrible death of a 12-year-old Texas girl. “I look forward to seeing him at the Fake debate on Thursday. Let him explain why he has allowed MILLIONS of people to come into our Country illegally!”

Now that Trump has telegraphed this coming assault, the Biden campaign has time to prepare a response. What should it be?

First, let’s be clear on why this line of attack is pure nonsense. Trump and MAGA figures have aggressively highlighted such killings lately, in many forms: Trump sometimes brings up victims at campaign events. MAGA lawmakers put them on T-shirts. Fox News airs visuals of migrant mug shots. And as Aaron Rupar shows, Fox sometimes even puts individual crimes in chyrons.

The argument is always that Biden’s policies are to blame for these horrors. But at the most obvious level, this is absurd, because immigrants do not commit crimes at higher rates than native-born Americans do. That includes undocumented immigrants. There is no link between immigration and violent crime.

Of course, the real Trump-MAGA message is that all undocumented immigrants should be presumed violent and dangerous, regardless of what any pointy-headed statistics say. MAGA figures are highlighting specific killings to smear millions—that is, they’re arguing by anecdote.

But even at the anecdotal level, the claims implode under scrutiny. Take Rachel Morin, a young mother who was horrifically murdered in Maryland, allegedly by a migrant from El Salvador. Trump highlighted her at a recent rally, and MAGA figures regularly cite her to........

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