Sanders and Clinton continue to dominate the presidential primary race.
Now the race will be decided in the most populous state in the country.
California is home to over 10 million registered voters.
The race for the Democratic nomination is now being watched closely by Democrats nationwide.
Clinton and Sanders are currently battling for the support of California’s Democratic Party leadership.
Sanders has won endorsements from some of the party’s top figures.
The Democratic National Committee is trying to secure endorsements from state party leaders, but many party officials are skeptical about Sanders and his platform.
Democratic National Committee Chairman Tom Perez has been urging state party officials to endorse Clinton.
Sanders is also challenging former Secretary of State Madeleine Albright, who endorsed Sanders.