David Harold Karr, born David Katz (1918, Brooklyn, New York – 7 July 1979, Paris) was a controversial American journalist, businessman, and Communist.Enthralled with the radical left, Karr began writing at a relatively young age for the Communist Party USA publication, the Daily Worker.In 1943 Karr came under the scrutiny of Rep. Martin Dies Jr., chairman of the House Special Committee on Un-American Activities for his Communist affiliations.