Final answer:
Realignment in politics involves a significant and lasting change in party loyalties and power balance, often initiated by critical elections resulting in a shift towards one party. These changes can have a long-term impact on the political landscape.
Explanation:
Realignment in political science refers to a major, enduring shift in coalition loyalties that changes the balance of power between two major parties. Realignment can be triggered by critical elections where a minority party wins and becomes dominant, leading to long-term party shifts. For example, the election of Franklin Roosevelt in 1932 brought about a realignment favoring the Democrats by forming the New Deal coalition.
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