The term "realignment" in the context of political parties refers to a significant and lasting shift in the political landscape that transforms party systems, voter coalitions, and electoral behavior. Realignments often occur during critical historical moments, such as economic crises or social movements, leading to shifts in party loyalties and the emergence of new political issues. For example, the New Deal realignment in the 1930s saw the Democratic Party expand its base to include various previously excluded groups. Understanding realignment helps analyze current political trends and potential shifts in voter behavior.