He's going to get destroyed.
I don't know. On one hand, people here are tired of Feinstein, but they recognize that she has a lot of seniority and that benefits California. If Clinton were president, I think DiFi would be safe, but with Trump I think people want change, and de Leon has a lot to offer in that regard.
Most Democrats are happy enough with their Democratic representatives. De Leon doesn't have enough name recognition or organization to go toe to toe against a state institution like Feinstein. He's probably going to lose 70-30 in the general election against her.