INDIAN TOWNSHIP, Maine (AP) — One voice has been largely silent as Maine residents prepare to vote whether to allow three more casinos in Maine.The Passamaquoddy Indians aren't putting money into Question 2 after being stung by a series of referendum defeats, explaining why the Passamaquoddies' voice has seemed largely silent during the latest high-profile casino campaign.Chief Joseph Socobasin from Indian Township says the tribe decided against gambling its money on another referendum. If it's approved, tribal leaders say the Passamaquoddies will be free and clear to solicit casino proposals.Question 2 authorizes the Passamaquoddies to build a racetrack casino in addition to allowing owners of the Scarborough Downs racetrack to put a casino in Biddeford. Passamaquoddies have been seeking a casino since 1992.