Biggest Primary Night Yet, Races in 6 States

Tonight, big primaries in six states, some of them central to which party controls Congress next year. Californians are voting in a massive gubernatorial primary to replace Gov. Gavin Newsom and in several House races under a new congressional map that aims to help Democrats flip as many as five Republican seats. There is also a tight contest for mayor of Los Angeles. And in Iowa, voters are picking candidates for the House, Senate and governor.

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