What type of lawyer do I need?

I am a union worker for a factory, about 6 or 7 months ago our shop steward was terminated and we have not had one since, I was told this is against our rights, and we could sue the union for this. Does anyone know about it?
Answers:
You should contact somone who studied labor law. I think findlaw.com has a referral service.

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Contact your regional office of the National Labor Relations Board.

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this is what you do write to the union office and tell them that
you do not have a shop steward for your job. and if that does
not work get you a labor lawyer.

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You would not sue the union --- you (and the union) would sue the company..
And it would be an attorney who specialize in union/labor law.