Between 1939 and 1963, the coalition was able to exercise virtual veto power over domestic legislation, and only limited liberal legislation was passed during this entire quarter century (most notably the very partial success of Truman's Fair Deal).
Under Democrat Lyndon Johnson liberals breached the power of the coalition by electing a liberal Congress in 1964, but the coalition regained strength in the U.S. Congressional elections of 1966. After the "Republican Revolution" in 1994, the Republicans took control of most of the conservative southern districts, so the Southern Democratic part of the coalition evaporated.
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