Here's a rundown of several key claims made during the hearing, and our reporting on the issues and numbers referenced by officials.

The policy that prevents city officials (including police officers) from cooperating with federal immigration authorities has been in place, in some form, for 40 years.

Mayor Brandon Johnson testified in front of the U.S. House Oversight Committee, staunchly defending the city of Chicago and its immigrant sanctuary policies. Johnson’s opening statement alluded to the misrepresentation of sanctuary cities.