Leo Leous Isacson (April 20, 1910 – September 21, 1996) was a New York attorney and politician. He was notable for winning a 1948 election to the United States House of Representatives from New York's twenty-fourth district (Bronx) as the candidate of the American Labor Party in what at that time The New York Times called "a test of Truman-[versus]-Wallace strength" with regard to the upcoming U.S. presidential elections and a "test today of the third-party movement headed by Henry A. Wallace". Early life Leo Isacson was born on April 20, 1910, in Manhattan, New York City, New York to a Jewish family. He had two sisters, Ruth (later Thielle) and Regina (later Hymowitz). He attended the public schools, then graduated from New York University in 1931 and New York University School of Law in 1933. Career Isacson was admitted to the bar in 1933 or 1934 and commenced practice in New York City. He defended labor and tenant cases. In 1936, Isacson became a member at the founding of the American Labor Party (ALP, which sought to advance the cause of trade unions). New York State Assembly In 1944, he was elected to represent the (Bronx Co., 13th D.) in the New York State Assembly as the candidate of the ALP and the Republican Party, and he served from 1945 to 1946 as a member of the 165th New York State Legislature. He lost re-election in 1946. In 1945, while serving in the Assembly, Leo Isacson ran for Borough President of the Bronx, coming in second with 25% of the vote. On January 6, 1947, the ALP named Isacson their "legislative representative". 1948 special Bronx election On February 17, 1948, Isacson won a stunning victory over Democratic nominee Karl Propper. Propper was a former president of the Bronx Bar Association, and his supporters included Eleanor Roosevelt and New York City Mayor William O'Dwyer. A special election was held to fill the vacancy caused by the resignation of Benjamin J. Rabin to the New York Supreme Court. Isacson received public support, first on January 24 from the Greater New York CIO Council, then on February 11 by radio and February 15 in a speech from former U.S. Vice President Henry A. Wallace. During the election, the Greater New York CIO Council charged that FBI agents had been visiting offices of "left wing" CIO locals to "intimidate them and curtail their