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Wave watch: How California’s primaries help predict general elections

Women holding signs at the Democratic National Convention
Women holding signs at the Democratic National Convention. Photo: ROBYN BECK/AFP/Getty Images

California's top-two primary system has some critics, but it's been an early look at what the general U.S. House election typically looks like, per NYT's Nate Cohn.

By the numbers: "Since 1990, the major party vote share in top-two congressional primaries in Washington (which also uses the top-two system) and California has differed from the general election result by an average of just three percentage points."