Questions about legal authority as federal agents crack down on Portland protesters

Federal officers were filmed shooting tear gas and smoke bombs at protesters early Tuesday morning in Portland, Oregon, and the Department of Homeland Security is preparing to deploy agents to other cities. CBS News’ Carter Evans reports from Portland, and Zolan Kanno-Youngs, a homeland security correspondent for the New York Times, joins CBSN with more on who these agents are and questions about their legal authority. Source