The code of conduct issued on Monday, following reports of undisclosed travel and gifts, includes no enforcement mechanism and lets individual justices decide ethics questions for themselves.
Eric Adams, who says he has visited Turkey at least six times, has longstanding ties to the Turkish community. The F.B.I. is now investigating those connections.
The Judiciary Committee postponed votes to issue subpoenas for benefactors of Justices Clarence Thomas and Samuel Alito after Republicans threatened a politically charged fight.
The justice failed to repay much, perhaps all, of the $267,230 loan. His benefactor wiped the slate clean, with ethical and potential tax consequences.