Unions often exert more power at the state and local level. In certain states, they can consistently wield a lot of power.

Unions in the US tend to be much more aggressive than they are in other places, which has in part led to their decline. Americans historically have tended to hate unions at the times when they’re powerful, and love them at times when they’re weak. In other words, people like the idea of unions in theory, but hate them in practice.