The Teamsters boss became the first-ever union president to speak at an RNC last month, delivering fiery remarks before a party that has a track record of opposing labor movements. Rank-and-file ...

The International Brotherhood of Teamsters ... his speech serving as an "indicator of how much the traditional constituencies of the two major parties have flipped." By speaking at the RNC ...

O'Brien reportedly requested to speak at the Democratic National ... A Teamsters spokesperson told The Hill that a Teamsters ...

After a weekend when the world was shaken by the attempted assassination of the former (and perhaps soon to be re-elected) President ... Teamsters, Sean O’Brien, was invited to address the RNC.

Democrats snubbed a request from Teamsters President Sean O’Brien to appear ... But his appearance at the RNC infuriated Democrats, who kept Teamsters leadership in the dark about their ...

Two months earlier, union president Sean O'Brien made history as the first Teamster leader ever to address the Republican National Convention this past July. Predictably, O'Brien's speech proved ...