Local law enforcement agencies play a limited role in immigration law, but that might change during Trump's promised mass deportation operation.

President Donald Trump has quickly mobilized wide swaths of the federal government to arrest and detain undocumented immigrants in the United States, part of a broader strategy to amass a large enforcement machine.

The Trump administration has escalated immigration enforcement by deploying troops, expanding detention capacity, and using military aircraft to repatriate migrants. Agencies such as ICE, DEA, and ATF have intensified efforts, conducting nationwide operations to detain undocumented immigrants labeled as security threats.

President Trump campaigned on a pledge to crack down on illegal immigration. But since taking office, he’s primarily targeted several long-standing programs that give migrants lawful ways to come to the U.