Are terrorists trying to cross the U.S. southern border? Here are the facts.
Washington — Concerns about whether known or suspected terrorists are exploiting the migration crisis along the U.S.-Mexico border to enter the country have intensified following the brutal terrorist attacks carried out by Hamas in Israel over the weekend.
Republican lawmakers, GOP White House hopefuls and conservative media figures have argued that the Biden administration's border policies have given terrorists an easier way to enter the U.S. and harm Americans. On Monday, former President Donald Trump claimed that the "same people" who killed or abducted more than 1,000 civilians in Israel are coming across the southern border separating the U.S. and Mexico, offering no evidence to support his assertion.
There has been a marked increase in Border Patrol apprehensions of individuals with matches on the U.S. terror watchlist over the past two years. But they represent a tiny fraction of all migrants processed along the southern border. Such incidents are more common along the U.S.-Canada border, and not all those on the watchlist are suspected terrorists.
Still, there are valid concerns about whether the U.S. has sufficient tools to ensure it detains all national security threats, including those entering the country clandestinely.
"Are terrorists flooding across the border? Probably not," said Theresa Cardinal Brown, a former Department of Homeland Security official under Presidents George W. Bush and Barack Obama. "But at the same time, it is true that the large number of people arriving does have national security implications."
Here's what we know about this issue, based on government data, reports and policy:
A spike in terror watchlist hits along the U.S.-Mexico border
When Border Patrol apprehends individuals, it is supposed to run criminal and national security screenings on them. The process includes checking names against the Terrorist Screening Data Set, or TSDS, an FBI system that tracks known or suspected terrorists as well as their affiliates.
Border Patrol apprehensions of individuals on the FBI's terrorism watchlist have increased sharply in recent years as the number of overall crossings recorded by the agency along the U.S.-Mexico border has soared to record levels.
In fiscal year 2023, Border Patrol reported apprehending 151 migrants with positive terrorism watchlist matches who entered the U.S. illegally along the southern border, an all-time high for the region that eclipsed the previous record of 98 set in fiscal year 2022, government figures show. In fiscal year 2021, the agency reported just 15 such apprehensions.
When including those processed at official ports of entry, there were 227 terror database hits with individuals processed along the southern border in fiscal year 2023.
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