Incoming border czar Tom Homan has singled out Chicago in past comments.

President-elect Donald Trump's border czar said the incoming administration is now "reviewing" whether to launch removal operations in Chicago after a series of news reports in recent days indicated the raids would be launched as early as the day after Trump is sworn in as president.

Homan said that even though his team is now reviewing how to proceed in Chicago, Trump and his incoming administration are still committed to quickly taking aggressive action.

"It's a priority that we get the criminals out of our country," he said. "And it is for everybody else -- it's one of the reasons I won the election by such a big margin. And it is a priority."

ICE has been ramping up its operations in anticipation of Trump's plan to carry out deportations, and the agency put out a request for ICE agents to volunteer to help with at least some of the operations, according to a source.

Although field teams have not been given specific details about what next week will hold, federal agents assigned to the region were asked to prepare cases and operations that were "ready to go," the officials said.

The plans for ICE raids next were first reported by the New York Times and the Wall Street Journal.

Homan has previewed these operations in past comments, especially targeting Chicago.

In December, Homan visited the city and promised enforcement operations would begin there.

"All that starts Jan. 21, and we're going to start right here in Chicago, Illinois," Homan said during the visit.

Homan has promised to go after violent offenders in the United States.