Utterback was elected as a
Democrat to the
Seventy-third United States Congress (March 4, 1933 – January 3, 1935), defeating Republican
Owen Brewster by 324 votes. Brewster contested the result, claiming fraud in the French-Canadian districts of
Aroostook County. Utterback prevailed, aided by a lack of sympathy for Brewster among the Republican 'old guard' who heard his challenge. Outgoing Republican Governor
William Tudor Gardiner declared "preposterous" Brewster's idea that Gardiner personally investigate the allegations. Fittingly for a candidate from the "
wet" Bangor, Utterback made his first congressional speech in support of the repeal of
Prohibition around which he had built his campaign. Bangor's saloons had been a major target of the Maine's prohibition law (in force for 75 years), the oldest in the nation. The
Maine law was widely supported in rural districts but not in the cities. Brewster was from the town of
Dexter, and his law office was in Bangor, but he continued to favor prohibition even though by the 1930s, the national Republican Party had begun to favor repeal. Brewster opposed Utterback in the 1934 election and defeated Utterback. One issue that went against Utterback was Congress' failure to support a planned
tidal power project in
Passamaquoddy Bay, which would have been a major job creator in Utterback's district. ==Later career==