Ahead of Wednesday's House Oversight and Government Reform Committee hearing with four mayors of sanctuary cities, committee chairman James Comer tells “Morning in America” he hopes to see the leaders walk back their policies. He adds that Congress will not support the cities if they “continue to obstruct the Trump administration’s effort” to deport immigrants and secure the border. #SanctuaryCities #JamesComer #Politics Start your day with "Morning in America," NewsNation's live three-hour national morning newscast hosted by Markie Martin. Weekdays starting at 6a/5C. #MorningInAmerica NewsNation is your source for fact-based, unbiased news for all Americans. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij