Trump’s Teamster Flirtation Complicates Republican Labor Stance

When Teamsters chief Sean O’Brien called Donald Trump “one tough S.O.B.” on Monday night, the former president beamed and his supporters cheered.

But the rest of O’Brien’s address to the Republican National Convention — the first of its kind by a head of the storied American union — laid bare the ideological challenges facing the party of big business as it embraces populism and recasts itself as the defender of the American worker.

O’Brien’s convention speech was an unusually overt hint from an American labor leader that his union’s 1.3 million members were open to supporting the Republican presidential nominee ...