GOP Senator Challenges Union President to Charity MMA Fight After Heated Exchange

Republican Senator Markwayne Mullin challenged Teamsters Union President Sean O'Brien to an MMA fight for charity after O'Brien insulted Mullin on social media and during a Senate hearing.
Mullin accepted O'Brien's open challenge to fight "anyplace, anytime" and scheduled the fight for September 30th in Tulsa, Oklahoma.
Mullin and O'Brien have frequently traded insults, including over O'Brien's high salary compared to average union members.
Mullin, a plumbing business owner, has had negative experiences with union intimidation tactics in the past.
The confrontation began during a Senate Health, Education, Labor and Pensions Committee hearing where O'Brien called Mullin a "greedy CEO."