Behind shadowy union boss pushing California’s billionaire’s tax — who faced sleazy workplace claims

The man who could make or break California’s future isn’t Gavin Newsom or Donald Trump — but a powerful union boss many fear is hell-bent on driving $1 trillion in wealth from the state. Dave Regan, who’s been the head of the SEIU-United Healthcare Workers West since 2011, wants billionaires to pay 5% of their...