hamden >> Seniors and U.S. Rosa L. DeLauro planned their next move Friday as they looked for ways to keep UnitedHealthcare and federal agencies accountable after the large insurer cut Yale-New Haven Hospital and more than 2,200 doctors around the state from their Connecticut networks. DeLauro, D-3, said she will ask the federal General Accounting Office to investigate the Center for Medicare and Medicaid Services on how it determined the remaining practitioners will be enough to serve patients and whether UHC gave the required notice to Greater New Haven clients. The letter has been signed by all five of Connecticut’s...