During his twenty-three year tenure on the Supreme Court, Duvall sided with Chief Justice John Marshall on most well-known decisions. Duvall favored a strong central government and nationalist interpretation of the Constitution.
Duvall had a multifaceted career. He studied law and was admitted to the bar in 1778. He served as a soldier in the Maryland militia during the Revolutionary War. He was clerk of the Maryland House of Delegates in 1777 and was elected a member in 1787. He served until 1794 when he was elected to the U.S. House of Representatives; he was reelected in 1796 when he resigned to become chief justice of the General Court of Maryland. Duvall was then appointed comptroller of the treasury by President Thomas Jefferson, serving under Secretary of the Treasury Albert Gallatin until 1811, when he was nominated by President James Madison to the Supreme Court.
Most notable for agreeing with Chief Justice John Marshall
Dartmouth College v. Woodward
Ogden v. Saunders
Taney, Roger Brooke