"The New Deal produced a political realignment, making the Democratic Party the majority (as well as the party that held the White House for seven out of the nine Presidential terms from 1933-69). With its base in liberal ideas, the South, traditional Democrats, big city machines, and the newly empowered labor unions and ethnic minorities. The Republicans were split, with conservatives opposing the entire New Deal as an alleged enemy of business and growth, and liberals accepting some of it and promising to make it more efficient."
