Aetna, UnitedHealth Group, and Community Health Network of Connecticut Inc. have submitted bids to serve Connecticut's HUSKY Medicaid program and a proposed new health plan for uninsured adults. A goal of the Charter Oak Health Plan, aimed at adults who have not been able to afford coverage, is to charge consumers no more than $250 a month in premiums. The insurers' bids have not been made public, so it's not known if they met the state's goals on premiums and co-pays.