CHICAGO (WLS) -- Nearly 25% of FBI agents are now working on immigration enforcement, according to numbers provided by the FBI to Sen. Mark Warner's office. But those numbers get even higher when looking at some of the biggest field offices around the country: up to 45% of those FBI agents are working on President Donald Trump's immigration push.

As operation "Midway Blitz" continues in Chicago, and more federal agents are deployed around the country to Democratic cities, prompting large public outcry, the ABC7 I-Team has learned 23% of FBI agents nationwide have been tasked with immigration enforcement. Traditionally, the FBI investigates foreign spies, terrorism, cyberattacks and transnational gangs.

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