Isadore Blumenfeld (September 8, 1900 – June 21, 1981), commonly known as Kid Cann, was a Romanian Jewish-American organized crime enforcer based in Minneapolis, Minnesota, for over four decades. He remains the most notorious mobster in the history of Minnesota. He was associated with several high-profile crimes in the city's history, including the 1924 murder of cab driver Charles Goldberg, the attempted murder of police officer James H. Trepanier, and the December 1935 assassination of investigative journalist Walter Liggett. He is also thought to have participated in the fraudulent dismantling of the Twin City Rapid Transit street railway during the early 1950s.