FBI Massively Ramped Up Immigration Enforcement: 23-Fold Surge in Personnel Under Trump Administration

Internal FBI records reveal an unprecedented redirection of federal law enforcement resources toward immigration enforcement during the first nine months of President Trump's second term. The bureau reassigned personnel at a scale that left senior immigration analysts scrambling to contextualize the numbers.

According to documents obtained through a Freedom of Information Act request, 279 FBI employees were working on immigration-related matters before Trump's January 2025 inauguration. By September 2025, that figure had surged to more than 6,500—an increase by a factor of 23. Over the period spanning from inauguration through early September, a total of 9,161 FBI personnel cycled through immigration work, representing roughly one in four of the bureau's 38,000 total employees.

Aaron Reichlin-Melnick, a senior fellow at the American Immigration Council who has testified before Congress on mass deportation costs, described the figures as staggering. The reassignment surge coincided with the early tenure of FBI Director Kash Patel, whose leadership has signaled a broader institutional shift toward immigration enforcement as a central mission. The records provide the first concrete public measure of how the administration operationalized its sweeping deportation agenda at the federal law enforcement level, raising questions about resource allocation across the bureau's traditional crime-prevention and national security functions.