Top Trump administration officials, including “border czar” Tom Homan and the acting deputy attorney general, visited Chicago on Sunday to witness the start of ramped-up immigration enforcement.

President Trump’s executive orders this week outline a sweeping agenda, from declaring an invasion at the border to curtailing birthright citizenship. But significant questions remain about what’s next.

The Trump administration this week directed federal prosecutors across the country to investigate and potentially prosecute local officials who get in the way of its immigration crackdown.