Mr. Fairhurst said in an interview Wednesday that he has known Judge Sotomayor since the 1980s, when they both served on the legal committee of an imported automobile trade association. (She represented Fiat, he Jaguar.)
It's not known if there are more working relations than the one mentioned.
And if that is the extent of the "relationship," that is simply not the kind of thing that requires disclosure. Mr. Greenberg certainly seems to have his knickers in a twist over losing his case and is trying to get some mileage for his client, but that doesn't mean this suddenly becomes a legitimate issue.