The latest California poll conducted by Survey USA outlines a possible landslide win for candidate Donald Trump in the June primary:

LOS ANGELES (KABC)  –An exclusive Eyewitness News poll conducted by SurveyUSA shows that in California, 54 percent of registered Republican voters are [supporting] Donald Trump and 57 percent of registered Democratic voters are [supporting] Hillary Clinton.
[…] For this poll, SurveyUSA interviewed 2,400 California adults from April 27 to April 30. Of the adults, 2,011 were registered to vote in the state of California. Of the California registered voters, 529 were determined by SurveyUSA to be likely to vote in the June Republican presidential primary. (read more)