The election was perhaps the most successful midterm of the 20th century for the party in control of the presidency. Despite opposition from Republicans, business organizations such as the US Chamber of Commerce, and disaffected Democrats who formed the American Liberty League, Roosevelt's New Deal policies were bolstered and his New Deal coalition was solidified. The election was critical in re-centering the Democratic Party in Northern, urban areas, as opposed the party's traditional base in the South. Conservative Republicans also suffered major losses across the country. Future president Harry S. Truman won election as Senator from Missouri during this election.