* GOP Sen. Mullin, union boss almost come to blows in Senate hearing: 'Stand your butt up' Fox News
* WATCH: Oklahoma senator challenges Teamsters president to a fight during Senate hearing PBS NewsHour
* Video: Senator Markwayne Mullin challenges Teamsters president to fight during hearing CNN
* 'Stand your butt up': Sen. Markwayne Mullin nearly brawls with Teamsters president POLITICO
* View Full Coverage on Google News
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