The Supreme Court refused Monday to directly consider whether the drug combination used in executions across the country amounts to unconstitutional cruel punishment. The justices had already agreed to hear arguments in April in a case brought by Florida death row inmate Clarence Hill about the procedure for lethal injection challenges to be filed in federal court. Monday's decision, which came on a separate appeal by Hill's lawyer, has little practical significance because Hill's other case is still pending. The justices did not comment when they declined to broaden their review and take up Hill's appeal that raised constitutional concerns...