28 U.S.C. § 1927 : US Code - Section 1927: Counsel's liability for excessive costs

      Any attorney or other person admitted to conduct cases in any
    court of the United States or any Territory thereof who so
    multiplies the proceedings in any case unreasonably and vexatiously
    may be required by the court to satisfy personally the excess
    costs, expenses, and attorneys' fees reasonably incurred because of
    such conduct.