Martin Dies, Jr., American lawyer and politician (born 1900)

Martin Dies Jr., also known as Martin Dies Sr., was a Texas politician and a Democratic member of the United States House of Representatives. He was elected as a Democrat to the Seventy-second and after that to the six succeeding Congresses. In 1944, Dies did not seek renomination to the Seventy-ninth Congress, but was elected to the Eighty-third and to the two succeeding Congresses. Again, he did not seek renomination in 1958 to the Eighty-sixth Congress. In 1941 and 1957, he was twice defeated for the nomination to fill a vacancy in the United States Senate. A Southern Conservative Democrat, Dies served as the first chairman of the Special Committee to Investigate Un-American Activities from 1937 through 1944.