Do armed right-wing militia groups pose a threat to U.S. presidential election?

Do armed right-wing militia groups pose a threat to U.S. presidential election?

According to a Armed Conflict Location and Event Data Project report, there is a risk that armed right-wing militia groups may be a source of violence on Election Day — and beyond. Former Department of Homeland Security adviser Charles Marino joins CBSN's Lana Zak to discuss at the states most at risk and why.