California, Iowa and 4 other states hold high-stakes primaries
Why it matters: The results will test Democratic strength in California and Iowa and could shape Republicans' narrow House edge in New Jersey.
Voters in California, Iowa, Montana, New Jersey, New Mexico and South Dakota are casting ballots in primaries that could reshape key races later this year. In California, the wide-open contest to replace term-limited Gov. Gavin Newsom has turned into a crowded top-two primary, with Democrats Xavier Becerra and Tom Steyer competing alongside Republican Steve Hilton, who has Donald Trump's endorsement. In Los Angeles, Mayor Karen Bass faces a difficult reelection fight as the city recovers from a devastating wildfire. Iowa offers Democrats a rare chance to claw back ground in a state that has slipped away in recent years, while Republicans in New Jersey face pressure tied to the unexplained absence of a congressman that could threaten their slim House majority.