Polls are officially closed in New Jersey, South Dakota, Iowa, New Mexico, Montana and California, where voters cast ballots in primary races for U.S. House, Senate and statewide offices.

Gov. Gavin Newsom cannot run again because of term limits.

In the final stretch, much of the attention has focused on Democrats Xavier Becerra, the former congressman and state attorney general who was also health secretary under President Joe Biden, and Tom ...