Chicago has entered what many consider a new uneasy phase of a Trump administration immigration crackdown that has already led to thousands of arrests.

A boarded-up building in a small Chicago suburb has become the front line of a federal immigration crackdown in the nation's third-largest city.

Leaders of a Chicago suburb that houses a federal immigration processing center say they were told that the Trump administration's promised immigration enforcement surge will operate seven days a week for about six weeks.