California is also a right to work state, BUT, depending on the reason they give for letting you go, you can successfully sue in some of these cases. I have a relative who is a lawyer, and she defends companies against these types of charges. She says the cases she usually settles or loses are those where the company either breaks their own written policy (like if their employee handbook has a termination process such as giving a warning, then a write up, then termination, and they don't follow it when they let you go) OR, simply by stating a reason they are terminating you. The best thing to do is get them to state a reason for your termination, then, depending on what they say, proceed from there.
Happyout