As World War II shifted into its last and costliest year, Roosevelt bested New York Governor Thomas E. Dewey (1902-1971) and Democrats retained control of Congress. Four-term Congressman Magnuson defeated Tacoma Mayor Harry P. Cain, who was on active duty as a paratrooper in Europe during the campaign.
Magnuson was first elected to the 1st District seat in U.S. House of Representatives in 1936, succeeding Marion Zioncheck (1901-1936), who committed suicide that same year. Magnuson succeeded fellow Democrat Senator Homer T. Bone, who was appointed to the U.S. Court of Appeals in 1944. Under intense pressure, lame duck Gov. Langlie appointed Magnuson to take Bone's vacant Senate seat on December 13, 1944, providing him additional seniority, which would boost his rise to power in Washington, D.C.
U.S. Senator Mon Wallgren defeated incumbent Governor Arthur Langlie, a former Seattle mayor and Republican (who would regain the governor's office four years later). Governor Wallgren later appointed Hugh Mitchell, his former secretary, to finish his U.S. Senate term. Harry P. Cain defeated Mitchell two years later. Democrats also kept their majority in the state legislature.
DeLacy beat Republican Robert Harlin for Magnuson's First District seat in Congress. A Seattle City Councilman, wartime shipyard worker, and former teacher at the University of Washington, DeLacy also headed the Washington Commonwealth Federation, a coalition of liberal political organizations formed in 1935. The WCF's adherence to left-wing positions such as pensions, production-for-use, and support of the Soviet Union led to its branding as a Communist Front. DeLacy was defeated two years later in a post-war Republican sweep of electoral offices.
Statewide, turnout for the election was almost 85 percent. Returns for selected races are as follows:
Franklin D. Roosevelt (D) - 486, 774 Thomas E. Dewey (R) - 361,689
Warren G. Magnuson (D) - 452,013 Harry P. Cain (R) - 364,356
U.S. House of Representatives - First District
Hugh DeLacy (D) - 118,354 Robert H. Harlin (R) - 103,099
Mon C. Wallgren (D) - 428,834 Arthur B. Langlie (R) - 400,604