A nearly two-year investigation by Democratic senators of Supreme Court ethics details more luxury travel by Justice Clarence Thomas and urges Congress to establish a way to enforce a new code of conduct.

The report follows a 20-month probe by Democrats on the Senate Judiciary Committee. But with Republicans set to take control of the Senate, the report is unlikely to go anywhere.

The investigation also found that the Judicial Conference of the United States, the body responsible for looking into lapses by federal judges, has failed to adequately address the ethical issues that have repeatedly rocked the high court.