The U.S. Border Patrol official who led controversial immigration enforcement raids in southern California this summer has arrived in Chicago, a new target of the Trump administration's escalating crackdown on illegal immigration, two people familiar with the matter told CBS News.

The official, Gregory Bovino, is in the Chicago area as federal officials vow to initiate a blitz of arrests in the region targeting immigrants suspected of being in the U.S. illegally, according to the sources, who requested anonymity because they were not authorized to speak to the press. Bovino was the top Border Patrol agent in California's El Centro sector until he was given command of a broader immigration enforcement campaign across the state in June.

Over the past several months, Bovino has become o

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