Steward Health Care CEO Ralph de la Torre has refused to testify at a Senate health committee hearing next week, despite a July vote by the majority of committee members to subpoena him to testify on the reasons behind his health system’s bankruptcy. Federal prosecutors in Boston are probing Steward Health Care over allegations of fraud and corruption. Senate health committee Chair Bernie Sanders (I-VT), who is leading the investigations into Steward Health Care’s management of dozens of community hospitals...