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Dennis Chavez
Dionisio "Dennis" Chávez (April 8, 1888 – November 18, 1962) was an American politician who served in the United States House of Representatives from 1931 to 1935, and in the United States Senate from 1935 to 1962. He was the first Hispanic to be elected to a full term in the US Senate and the first US Senator to be born in New Mexico, which was still a US territory at the time of his birth.
Source: Wikipedia