Party affiliation: Democratic Party
Son of Denis and Elizabeth (Sheehan) O’M.; student Columbia, 1905-07, LL.D., 1938; LL.B., Georgetown U., 1920, LL.D., 1941; De Paul U., 1946; LL.D., U. Wyo., 1947; D.Sc. in Bus. Adminstrn., Hill Coll., 1948; married Agnes V. O’Leary, June 11, 1913. Editor Cheyenne State Leader, 1916; began law practice at Cheyenne, Wyo., and Washington, D.C., 1920; 1st asst. postmaster gen. of U.S., 1933; U.S. senator, 1934-53, 54—. Vice chmn. Democratic State Com., Wyo., 1922-30, mem. Nat. Com., 1930-34, vice chmn. nat. campaign com., 1932. Mem. Am. Bar Assn., Phi Kappa Sigma. Catholic. Home: 502 E. 22d St., Cheyenne, Wyo. Office: Senate Office Bldg., Washington.
attended the parochial and public schools
Columbia University, New York City; moved to Boulder, Colo., in 1908 and engaged as a reporter on the Boulder Herald; moved to Cheyenne, Wyo., in 1916 and served as city editor of the Cheyenne State Leader; executive secretary to Senator John B. Kendrick 1917-1920; graduated from the Georgetown University Law School, Washington, D.C., in 1920;
- Appointed First Assistant Postmaster General in 1933, and served until December 31, 1933, when he resigned to become a Senator; appointed on December 18, 1933, as a Democrat to the United States Senate to fill the vacancy caused by the death of John B. Kendrick, and elected on November 6, 1934, to fill this vacancy and also for the term commencing January 3, 1935; reelected in 1940 and again in 1946, and served from January 1, 1934, to January 3, 1953; chairman, Committee on Indian Affairs (Seventy-eighth and Seventy-ninth Congresses), Committee on Interior and Insular Affairs (Eighty-first and Eighty-second Congresses), co-chairman, Joint Committee on the Economic Report (Eighty-first and Eighty-second Congresses); unsuccessful candidate for reelection in 1952; elected on November 2, 1954, to fill the vacancy caused by the death of Lester C. Hunt, and also elected for the full term commencing January 3, 1955, and served from November 29, 1954, to January 3, 1961; was not a candidate for renomination in 1960; resumed the practice of law in Washington, D.C., and Cheyenne, Wyo.;
bioligical mother: Elizabeth E. Sheehan