What to expect: If no candidate receives a majority of the vote, the top two candidates will advance to an Aug. 4 runoff. Most Californians vote by mail, and ballots postmarked on or before Election Day have one week to arrive. In the 2024 primary, about half of results were reported by 5 a.m. Eastern time the day after the election. It took 10 days before 95 percent of results were reported.