The process of approving a third casino to compete with a planned MGM casino in nearby Springfield, Massachusetts could be slowed by a bill being considered by the legislature's Commerce Committee.  The leaders of the Mohegans and Mashantucket Pequots say there's no need for a new study as called for by the bill.  But  Kent-based Schagticoke Tribal Nation Chief Richard Velky wants the study.  Velky also testified before the Public Safety Committee about Act Concerning Gaming.  He says tribal gaming is about creating an economic opportunity for an impoverished people.  He says the tribe would use that opportunity to create jobs for members and for surrounding communities.