California Shows Why Nonpartisan Primaries Stink

California’s Republican Party is so weak that no Republican has won statewide office there in 20 years. Yet there’s some danger this fall that the Golden State—where nearly twice as many voters register Democratic as Republican—will elect a Republican governor. It’s even conceivable that the general election will be a contest between two MAGA Republican gubernatorial candidates. Blame California’s top-two nonpartisan primary system, a good-government reform adopted by ballot referendum in 2010 t...