Details of planned immigration raids are unclear, but they would be the opening step in the president-elect’s goal of overseeing the largest deportation program in history.

Plans remain fluid—but there is no doubt of a push for highly visible raids in Democratic cities in the first days of the new administration

Immigrants in large cities have been preparing for mass arrests since Trump won election in November, but reports that his initial push would be in the Chicago area has brought a new sense of urgency and fear.