I live in Virginia and am employed part time, on call by a non-profit company in California. I have worked less than 30 days for them in the last 7 months. Recently they have indicated that there is a perceived conflict of interest because I am a member of a union. They have indicated that I must cease being a member of any union, and, not take any other employemnt if it requires union membership. Is this legal?What is the name of your state (only U.S. law)?