"Justices are subject to a federal law that prohibits them from hearing cases in which their spouses have “an interest that could be substantially affected by t

"Justices are subject to a federal law that prohibits them from hearing cases in which their spouses have “an interest that could be substantially affected by the outcome of the proceeding.” The statute, 28 U.S.C. section 455, also requires them to disqualify themselves from any proceedings in which their “impartiality might reasonably be questioned.”