Officer Dunn: Anybody linked with failures of Jan. 6 must be held accountable including Trump

Donald Trump apparently just could not say the election was over, as seen in a video taped on Jan. 7, aired during Thursday's Jan. 6 Committee Hearing. As we learned that night, that 187 minutes during which the former president apparently did not respond to end the Capitol attack on January 6th was not inaction. He was actively watching and waiting for his coup to succeed, according to the select committee. Capitol Police Officer Harry Dunn joins Joy Reid to discuss the culmination of the first round of hearings.