Secretary of State Alex Padilla reported on Friday afternoon that some 2.4 million votes remain uncounted from the statewide primary.
A state lawmaker wants to open up California's presidential primaries to all voters.
After four years, voters and candidates are still getting used to the state's top-two primary system.
Kamala Harris has nabbed first place and Loretta Sanchez second place in California's U.S. Senate primary, according to AP. The two Democrats will face off in a November runoff.