![Markwayne Mullin: Watch US senator challenge union leader to a fight](https://cdn.newsserve.net/en/knowledge/Markwayne-Mullin_20190521.jpg)
Markwayne Mullin: Watch US senator challenge union leader to a fight
Republican Markwayne Mullin rose from his seat at a hearing to challenge a union leader to a fight.
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Republican Markwayne Mullin rose from his seat at a hearing to challenge a union leader to a fight.
Full ArticleRepublican Markwayne Mullin rose from his seat at a hearing to challenge a union leader to a fight.
The heated exchange between Republican Markwayne Mullin and Sean O'Brien occurred during a Senate hearing.