Yes, you can.  In California the law protects employees from being wrongfully terminated based on being a member of a protected class.  It is illegal to terminate someone based on race, age (over 40), religion, ethnic origin, ancestry, gender, sexual orientation, gender identity, physical disability, mental disability, military or veteran status, and medical condition such as cancer or certain other conditions. You can sue for wrongful termination based on a violation of any law that protects the public and is considered to be a public policy of the State of California including wage and hour law and discrimination law.