Thomas Nast was an American cartoonist and illustrator who is best known for his satirical depictions of Boss Tweed, a corrupt politician from New York City in the late 19th century. Nast's cartoons were instrumental in exposing the rampant corruption of Boss Tweed and his Tammany Hall political machine. GRAFT was a term used to describe the illegal activities of Boss Tweed and his associates, which included bribery, extortion, and embezzlement. Harris was the last name of Boss Tweed, whose full name was William Marcy Tweed.