According to this story, the wife of Supreme Court Justice Clarence Thomas has received over $680,000 over the years from a Conservative group…but when Justice Thomas has filled out his disclosure forms, under "Spousal Income," he writes, "None."
I don't know how big an ethical breach this is. But I do know that if it came out that Justice Breyer had a wife getting that kind of money from a Liberal group and not disclosing it, we'd have already heard demands for his resignation and talk of impeachment.