An ascendant pro-labor wing of the Republican Party had its moment in the spotlight Monday as International Brotherhood of Teamsters President Sean O’Brien addressed the Republican National Convention.

The speech came just hours after former President Donald Trump announced that Sen. J.D. Vance (R-OH) would join him on the Republican presidential ticket. Vance has been one of a handful of Republican lawmakers who has consistently supported organized labor and taken a critical approach to corporate power.