Thomas Clayton (July 1777 – August 21, 1854) was an American lawyer and politician from Dover in Kent County, Delaware. He was a member of the Federalist Party and later the National Republican Party and the Whig Party. He served in the Delaware General Assembly, as Attorney General of Delaware, as Secretary of State of Delaware, as Chief Justice of the Delaware Supreme Court, as U.S. Representative from Delaware, and as U.S. Senator from Delaware. In 1846 he was one of two members of the United States Senate to vote against declaring war on Mexico. Early life and family Clayton was born at Massey in Kent County, Maryland, son of the former Governor of Delaware, Dr. Joshua Clayton, and Rachael McCleary Clayton. It is said he was born while his mother was fleeing invading British troops on the way from their Elk River landing to the Battle of Brandywine. While the Clayton's were natives of Kent County, Delaware, Rachael McCleary was the niece and adopted daughter of Richard Bassett, the aristocratic heir to the expansive Bohemia Manor estates. The family lived at Bohemia Manor and through this connection, Joshua Clayton later acquired his homestead from these estates, in Pencader Hundred, New Castle County. Thomas Clayton graduated from the Newark Academy, now the University of Delaware, studied law under Nicholas Ridgely in Dover, Delaware, and began a law practice there in 1799. His wife's name was Jennette Macomb, they had four children, and belonged to the Presbyterian Church. He was the cousin of U.S. Senator John M. Clayton. Professional and political career While pursuing his practice of the law, Clayton began his public career as the clerk of the Delaware House of Representatives in 1800. He then served as a member of that body for 8 years, between the 1803 session and the 1814 session. He was elected to the Delaware Senate for the 1808 session, but resigned to become the Delaware Secretary of State for 2 years. Subsequently, he was appointed the Delaware Attorney General and served in that office from 1810 until 1815. In 1814 Clayton was elected as a Federalist to one of two at-large seats Delaware had in the U.S. House of Representatives, and served one term there, from March 4, 1815 until March 3, 1817. While he was in Congress, it was proposed that the compensation given U.S. Representatives be increased $6 a day to $1,500