Presidential historians and most astute national political observers and chroniclers have concluded that the most profound legacy a president can achieve is the appointment of United States Supreme Court Justices. Presidents serve four-year terms. Justices serve for a lifetime.
The Supreme Court of the United States is the ultimate final word on law and public policy in the United States. After they are appointed by the president and confirmed by the U.S. Senate, they are impregnable to political whims or influence. They are sovereign and omnipotent. They are treated royally and usually serve on the high tribunal for over two decades or more.