Supreme Court justices are under renewed scrutiny due to recently uncovered financial dealings.
That's a question that the Romans asked over 2,000 years ago," Doron Kalir, a professor at Cleveland-Marshall College of Law and an expert in legal ethics, told Insider.
But parties arguing before the Supreme Court cannot challenge justices for a lack of recusal like people can in lower courts.
There is an official Code of Conduct for Federal Judges, but it applies to all federal judges except the Supreme Court justices, simply because that's what the Supreme Court decided, according to Kalir.
"That's what the Supreme Court decided, and they're supreme," Kalir told Insider.