Question: How did the membership change in the senate of the 79th United States Congress (Washington state)?
Answer: Senator in the 79th United States Congress (Washington state), Monrad Wallgren (D), was until January 9, 1945 then Hugh Mitchell (D), from January 10, 1945 till December 25, 1946 and Harry P. Cain (R), from December 26, 1946.