Congress did not order judges to make a decision. The Congress transferred Terri's case to Federal Court jurisdiction. That's a difference. Rick Santorum believes that the Federal Court Judge did not review the case properly as he was asked to do by Congress. In other words, Judge acted as if he superior to the Congress. Judiciary is not Superior to Congress--they are equal branches according to the US Constitution.
Read 41. Santorum's just whining for the cameras because the judgement didn't go his way. That's what happens when you leave a judgement up to the same law that has resulted in over a dozen prior judgements in Michael Schiavo's favor.