In recent years, the City of Denver has served more than 40,000 migrants. Now, Mayor Mike Johnston is being asked to testify in a hearing on immigration and so-called "sanctuary jurisdictions."

A spokesperson for the mayor's office could not confirm if he plans to testify before Congress on Denver's "sanctuary city" status, and said the mayor is still reviewing the letter from Congress. Denver7's Kristian Lopez reports.

A congressional committee on Monday asked Denver Mayor Mike Johnston to testify in Washington, D.C., next month to defend the city’s policies limiting local police cooperation with federal