As President Trump and supporters continue the push to levy an arbitrary travel ban from a smattering of predominantly Muslim countries, a debate rages in the United States about the validity — and effectiveness — of preventing terrorism by strangling immigration.

Now, simple data can put that debate to rest.

“Since January 2015, the FBI has also arrested more anti-immigrant American citizens plotting violent attacks on Muslims within the U.S. than it has refugees, or former refugees, from any banned country,” writes Nora Ellingsen for Lawfare.

Ellingsen would know, too, after having worked for the Federal Bureau of Investigation’s Counterterrorism Division for five years, she left for Harvard Law School — but has tracked statistics closely for Lawfare since. And Ellingsen remains cagey to unreported information — she knows what is likely taking place behind the scenes, even when it either isn’t or hasn’t been disclosed to the public.

In a recent article titled,

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