Teamsters president Sean O'Brien took the podium at the Republican National Convention on Monday to talk about how work against big business brought him to address the GOP gathering.. The RNC is ...

Sean O’Brien on Monday became the first Teamsters union president to speak at a Republican National Convention. In his speech, he said the American worker is being taken for granted.

Sean O’Brien, general president of the International Brotherhood of Teamsters, speaks during the first day of the 2024 Republican National Convention on July 15 in Milwaukee, Wisconsin.

Teamster President Sean O'Brien's speech at the Republican National Convention has drawn backlash from both the union and its critics, who view his move as "two-faced." ...

Sean O'Brien speaks during the first day of the 2024 Republican National Convention at the Fiserv Forum in Milwaukee, Wisconsin, July 15, 2024.

Sean O’Brien, president of the International Brotherhood of Teamsters, speaks during the Republican National Convention on Monday, July 15, 2024, in Milwaukee, Wisconsin.

The president of one of the biggest unions in the country just spoke at the Republican National Convention. Sean O'Brien, the International Brotherhood of Teamsters president and Massachusetts ...

President of the International Brotherhood of Teamsters Sean O'Brien speaks on stage on the first day of the Republican National Convention. Chip Somodevilla / Getty Images ...

President of the International Brotherhood of Teamsters Sean O’Brien speaks on stage on the first day of the Republican National Convention at the Fiserv Forum on July 15, 2024 in Milwaukee ...

Teamsters President Sean O’Brien is addressing the Democratic National Convention (DNC) for reportedly snubbing him following his historic speech at the Republican National Convention (RNC) last ...

Teamsters president Sean O'Brien took the podium at the Republican National Convention on Monday to talk about how work against big business brought him to address the GOP gathering. The RNC is ...