Russ Olivo, Woonsocket Call, January 3, 2012 Woonsocket – Boston-based Steward Health Care System has hired a prominent government lobbyist for assistance in dealing with state regulators handling its application to buy financially struggling Landmark Medical Center. Former Warwick Mayor Joseph Walsh of Government Strategies Inc. has already asked some legislators to rally constituents in support of the merger, which may be the Cass Avenue hospital’s only hope for survival. “What I’m looking to do is make sure the people in Providence don’t get the impression that the community takes the hospital for granted,” said State Senator Marc A. Cote ... Steward