He worked on railroads in a number of capacities, as a trainman, conductor, and telegraph operator, until 1910. After this stretch, he worked in lumber, mining, and livestock raising; he was also a member of the Clark ForkBoard of Trustees. In 1925, White received an unexpected windfall when a valuable mine of Galena ore was found on his property. It was this unexpected find that gave his family a small fortune and allowed him to become a real player in Idaho politics. He was a delegate to the Democratic National Convention in 1928, 1932, and 1936, during which period he rose to prominence as a politician.
Congress
White first sought election to Congress during the 1930 election; he gained the Democratic nomination, but was soundly defeated by longtime Republican incumbent Burton French of Moscow. Both were nominated again in 1932 and White unseated French as Franklin D. Roosevelt's landslide victory swept the nation. Like many rural politicians during the Great Depression, White sought policies and legislation that enabled farmers in Idaho to stabilize their finances and enhance their agricultural output. White was also a supporter of President Franklin Roosevelt's New Deal, which helped thousands of families in Idaho from 1933 to 1939. Due to a strong interest in reclamation projects in Idaho and the Pacific Northwest in general, White chaired the currently-defunct Irrigation committee while in congress, and also was a member of the Committee on Coins, Weights and Measures. One of Congressman White's major accomplishments while in office was the acceptance and use of silver certificates by the Department of the Treasury. The Silver Purchase Act of 1934 was a major win for White and the silver mining industry in Idaho, Montana, and Colorado, as the federal government had purchased silver at prices well above market value, which enabled mine operators to remain in business during the Great Depression. Congressman White was also instrumental in bringing large irrigation projects to Idaho, including the Bonneville Dam project in 1938 and the Grand Coulee Dam project in 1941. Although his family left Mississippi at a relatively early age, White seemed to have deeply internalized the racial views of his birthplace, railing against the Chinese during the debate over the repeal of the Chinese Exclusion Act in 1943, arguing that "There is no melting potin America that can change their habits or change their mentality." He sought re-election to an eighth term in the 1946 race but was narrowly defeated by Republican Abe M. Goff of Moscow. In the 1948 election, White defeated Goff and returned to the House but had lost his seniority. In 1950, he sought the Democratic nomination for U.S. Senate, but it went to D. Worth Clark of Pocatello. At age 75, White sought the party's nomination in 1952 to regain his House seat in the first district, but lost to Gracie Pfost of Nampa. He retired from public life and died in Spokane in 1956, where he had lived for three years, and was buried in the family cemetery in Clark Fork. His only son, Compton I. White, Jr., was also elected to Congress for the First District in 1962 and 1964. He lost elections in 1966 and 1968.
Election results
Source: ^ 1948 election included 93 votes for Socialist Party candidate Richard M. Shaefer.
