Original sentence: Byrd is the only Senator to have voted against the nominations of both Thurgood Marshall and Clarence Thomas to the United States Supreme Court, the only two African-Americans to have been nominated to the court
Edited sentence: Byrd is the only Senator to have voted against the nominations of both liberal Thurgood Marshall and  conservativeClarence Thomas to the United States Supreme Court, the only two African-Americans to have been nominated to the court