Federal prosecutors have broadened their investigation of Illinois Gov. Rod Blagojevich's administration, subpoenaing records of ties between his lobbyist friend and a hospital that got a favorable decision from a state board allegedly controlled by convicted influence peddler Antoin "Tony" Rezko. The subpoena delivered to Provena Hospital sought information about the hospital's relationship to John Wyma, a close friend of the governor. Wyma was registered to represent Provena when it got approval from the Illinois Health Facilities Planning Board in April 2004 to proceed with development of an open-heart surgery unit in Elgin.