In 1940, Neuberger was elected to the Oregon House of Representatives. His political career was interrupted by World War II, during which Neuberger served in the U.S. Army as an officer from 1942 to 1945. Back in civilian life, Neuberger continued to work for the "Times" and write books, and was elected to the Oregon State Senate in 1948, after losing in 1946. Neuberger and State Senator and future Governor Robert Holmes were two of the leading liberals in the Oregon legislature at a time of Republican dominance. During the 1949 legislative session, Democrats succeeded in forcing a vote in favor of one of the nation's first fair employment practices laws, though watered down by the Republican majority.