Oklahoma GOP senator tells union leader 'shut your mouth' in heated exchange over union intimidation

By Morgan Rimmer, CNN Republican Sen. Markwayne Mullin of Oklahoma told a witness to “shut your mouth” during a heated exchange at a Senate hearing on Wednesday. The witness, general president of the International Brotherhood of Teamsters Sean O’Brien, went toe-to-toe with Mullin at the hearing before the Senate Health, Labor, Education and Pensions Committee.

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