Brien McMahon

Brien McMahon (b. October 6, 1903, Norwalk, Connecticut – d. July 28, 1952, Washington, D.C.), who was born James O'Brien McMahon and shortened his name in later life, was an American lawyer and politician who served in the United States Senate (as a Democrat from Connecticut) from 1945 to 1952 and, as a major figure in the establishment of the Atomic Energy Commission and the first chairman of the Joint Committee on Atomic Energy, was a key figure in the early years of atomic weapons development.

Preceded by: John A. Danaher

Class 3 Senators of Connecticut 1945-1952

Succeeded by: William A. Purtell