His title was Mr. President.
That would be William Howard Taft, who was not just a Justice, but the Chief Justice.
William Howard Taft President 1909-1913 Chief Justice 1921-1930
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William Howard Taft went on to become the Supreme Court Chief Justice.
William Howard Taft
William McKinley was president from 1897-1901 he was the 25th president he appointed William Howard Taft 27th president from 1909-1913 as Chief Justice during his term
Andrew Jackson was a justice of the Tennessee Superior Court before he was President. William Howard Taft was a federal circuit judge before he was president and was appointe to the US Supreme Court after the presidency.
After being appointed by President Warren G. Harding, former President William Howard Taft served as Chief Justice of the U.S. Supreme Court from 1921-1930.
William Howard Taft
Taft is the last name of the William who was Chief Justice, being William Howard Taft, former president of the United States.
William Howard Taft became Chief Justice of the US Supreme Court from 1921-1930.
10th Chief Justice of the United States