Six states are holding primary contests on Tuesday, including California, where voters will be choosing which two candidates will be on the ballot in November in the governor's race. Los Angeles residents will be voting in the mayoral contest, with reality television star Spencer Pratt, a Republican, hoping to unseat incumbent Democratic Mayor Karen Bass. If no candidate receives a majority on Tuesday, the top two candidates will face off in November. Here are the major races to watch:California governor's raceIncumbent Gov. Gavin Newsom — one of the top 2028 presidential contenders and one of the most powerful members of the Democratic Party — is prevented from running again due to term limits. California chooses its nominees via a top-two primary, meaning the two leading vote-getters will advance to the general ballot in November. The race has been wide open, especially after former Vice President Kamala Harris and U.S. Sen. Alex Padilla opted not to run. Former Rep. Eric Swalwell, a late entry into the race, had been one of the candidates leading polls until he dropped out of the race and resigned from his seat in April amid allegations of sexual assault. After Swalwell's exit, Xavier Becerra, the health secretary under President Biden, has surged, having previously lagged in polling and fundraising. Billionaire Democrat Tom Steyer has steadily worked his way to the top of the Democratic polls as well, having spent more than $195 million in broadcast TV, cable and radio ads — the most expensive political advertising campaign in the country this year, according to AdImpact. Becerra and Steyer have stepped up their attacks on each other, which could get even nastier if it does become a race in November with two Democrats on the ballot. Former Rep. Katie Porter, who was considered an early frontrunner after Harris decided not to run, has since fallen in recent polls after two viral incidents — one in which she tripped over her answers with a CBS Sacramento reporter and an old video berating her staff. But Porter, who gave up her Orange County seat to run for Senate in 2024 and finished third, leads among independents, according to a recent Emerson College survey. San Jose Mayor Matt Mahan, a moderate, was a favorite of the tech industry but has failed to gain traction in polls. Former Los Angeles Mayor Antonio Villaraigosa, a Democrat, is also on the ballot in his second attempt for the governor's office after running against Newsom in 2018.