GOP Senator Challenges Teamsters President to Physical Confrontation During Senate Hearing

Republican Senator Markwayne Mullin challenged Teamsters president Sean O'Brien to a physical fight during a Senate hearing, after O'Brien called him a "clown" and a "fraud" on Twitter. The confrontation was diffused by Senator Bernie Sanders, who reminded them they were in a hearing and not a boxing ring. The purpose of the hearing was to discuss how unions are improving the lives of working families. Mullin defended his actions, stating that he was responding to O'Brien's challenge. O'Brien stood by his tweets and suggested they have a discussion over coffee instead.