De la Torre is asking the court to declare that all actions related to enforcement of the subpoena are invalid and unconstitutional — including the vote of the committee on Sept. 19 approving the criminal contempt resolution and its decision to present the resolution to the full Senate for a vote.

Steward Health Care's Ralph de la Torre, who is stepping down as the bankrupt private hospital network's chief executive, on Monday sued a U.S. Senate committee which has voted to hold him in contempt for refusing to testify about Steward's financial troubles.