MSNBC's McGurk: 'We Need to Presume that We Are Now at War with Iran'

During a Sunday appearance on MSNBC's "Kasie DC," network foreign affairs analyst Brett McGurk, the former U.S. special envoy for the coalition against the Islamic State, weighed in on the U.S. military’s recent airstrikes in Baghdad to kill Iranian military leader Qasem Soleimani.