Burdick joined his father's law firm in
Fargo, where he advised farmers who were threatened with
foreclosure during the years of the
Great Depression. He later recalled, "I guess I acquired a social conscience during those bad days, and ever since I've had the desire to work toward bettering the living conditions of the people." In 1933, he married Marietta Janecky; the couple had one son and three daughters. She died in 1958. Like his father, Burdick became active in politics and joined the
Nonpartisan League (NPL), a
populist-progressive group which was allied with the Republican Party. As a candidate for the NPL, he unsuccessfully ran for
attorney general in 1934 and 1940,
state senator from
Cass County in 1936, and
lieutenant governor in 1942. Burdick, who believed the NPL was dividing the state's progressive vote, began to advocate aligning the NPL with the
Democratic Party. He subsequently ran for
Governor of North Dakota in 1946 as a Democrat, but was again unsuccessful. He was a delegate for former
Vice President Henry A. Wallace, who ran as a candidate of the
Progressive Party, in the
1948 presidential election. In 1956, the NPL aligned with the Democratic Party to create the
North Dakota Democratic-Nonpartisan League Party. That same year, Burdick suffered his sixth and final electoral defeat when he ran against Republican incumbent
Milton Young for the
U.S. Senate. ==Congressional career==