REUTERS/Lucas Jackson
Democratic U.S. presidential candidate Hillary Clinton speaks during her California primary night rally held in the Brooklyn borough of New York, U.S., June 7, 2016.
With 63% of votes counted, CNN reports that Clinton had won 56.3% of votes, while rival Bernie Sanders had won 42.8%.
Clinton also won the New Jersey, South Dakota, and New Mexico primaries on Tuesday. Sanders won Montana and North Dakota.
Clinton cemented her status as the presumptive Democratic presidential nominee with her wins Tuesday, although Sanders has vowed to continue his campaign.
"Thanks to you, we reached a milestone," Clinton told her supporters in a speech Tuesday night.