The democrat who hopes to unseat Congressman Greg Ganske says he’d vote to establish permanent trade relations with China only if labor and human rights concerns were addressed. He says those are serious details that need to be worked out.Des Moines attorney Mike Huston formally announced his candidacy today at stops in Des Moines and Council Bluffs. Huston is a fourth generation Iowan and life-long democrat.Republicans have held majority control of Congress for the past six years. Huston says Ganske has failed fourth district voters on several fronts. He says that includes failing to get a “Patients Bill of Rights” passed. He says Ganske has also failed to get Iowa equity in Medicare reimbursement.During his formal speech, Huston acknowledged he’s a recovering alcoholic. He says his treatment 20 years ago save his life and substance abuse, education, prevention and treatment is his personal crusade.Huston says his chances of unseating Ganske are enhanced because all statewide democrat candidates carried the fourth district in the last election.Huston has never run for elected office before. Ganske, who’s a plastic surgeon, was a political newcomer six years ago when he won the congressional seat held by a democrat for decades.