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.

Any movement on the issue appears unlikely as Republicans prepare to take control of the Senate in January, underscoring the hurdles in imposing restrictions on a separate branch of government even as public confidence in the court has fallen to record lows.

The 93-page report released Saturday by the Democratic majority of the Senate Judiciary Committee found additional travel taken in 2021 by Thomas but not reported on his annual financial disclosure form: a private jet flight to New York’s Adirondacks in July and jet and yacht trip to New York City sponsored by billionaire Harlan Crow in October, one of more than two dozen times detailed in the report that Thomas took luxury travel and gifts from wealthy benefactors.

“The highest court in the land can’t have the lowest ethical standards,” the committee chairman, Illinois Sen. Dick Durbin, said in a statement. He has long called for an enforceable code of ethics.