Jeh Johnson: Mass Deportation Will Cause Sanctuary Cities to Protect 'Public Safety Threats'

On Monday's broadcast of "CNN Newsroom," former Homeland Security Secretary Jeh Johnson argued that the priorities for ICE enforcement should be public safety and national security threats, of which there are plenty, and that the idea of mass deportation is "going to turbocharge the sanctuary city movement in big cities, such that local law enforcement will refuse to work with ICE in getting at the public safety threats."