Kentucky Rep. James Comer, the Republican who chairs the House Oversight Committee, confronted four Democratic sanctuary city mayors on Wednesday over their refusal to fully cooperate with Immigration and Customs Enforcement.

Rep. Ayanna Pressley had a heated exchange with Rep. James Comer during a hearing with "sanctuary city" mayors.

So-called sanctuary city policies are a “public nightmare” that make American cities more dangerous, Rep. James Comer said Wednesday, opening a congressional hearing with mayors from four major cities the Trump administration says are hindering its mass deportation agenda and protecting people who are in the United States illegally.