LOS ANGELES (AP) — Voters are casting ballots in California's primary election, setting the stage for November races.

Traffic at polling stations is expected to be light Tuesday because many people have voted in advance.

In San Diego, 42-year-old Sean Spicer says he voted because it's a civic duty, although he doesn't like California's top-two primary system.

In Los Angeles, gubernatorial candidate and former LA Mayor Antonio Villaraigosa was among a few early morning voters casting ballots in the library at Robert F. Kennedy Elementary School.

Democratic Lt. Gov. Gavin Newsom is the front-runner in the race for governor and polls show a surge by Republican businessman John Cox. Other major candidates are state Treasurer John Chiang, former education Superintendent Delaine Eastin and Assemblyman Travis Allen.

President Donald Trump tweeted support for Cox.