A Senate hearing on Tuesday went sideways, back and forth, and quite nearly to blows when Teamsters President Sean O'Brien and Sen. Markwayne Mullin (R-Oklahoma) nearly agreed to a fist fight right there in the chamber.
This isn't the first time Mullin and O'Brien have exchanged fighting words. Back in March, when discussing the Protecting the Right to Organize Act, Mullin accused O'Brien of attempting "intimidating" behavior.
Tuesday's hearing, titled "Standing Up Against Corporate Greed: How Unions are Improving the Lives of Working Families" from the Senate committee on Health, Education, Labor, and Pensions, chaired by Senator Bernie Sanders (I-Vermont), seemed inviting enough for the union boss.
[Related: Senator Bernie Sanders sends a message to trucking]
But Mullin had some unfinished business to attend to. A tweet from the Teamsters boss back in June, apparently, just didn't sit right with Mullin.
This is how Tuesday's heated exchange transpired:
"After you left here, you got pretty excited about the keyboard," said Mullin, before reading aloud the above tweet.
