Realigning election
（重定向自Critical election）
A realigning election (often called a critical election or political realignment) is a term from political science and political history describing a dramatic change in the political system. Scholars frequently apply the term to American elections and occasionally to other countries. Usually it means the coming to power for several decades of a new coalition, replacing an old dominant coalition of the other party as in 1896 when the Republican Party (GOP) became dominant, or 1932 when the Democratic Party became dominant. More specifically, it refers to American national elections in which there are sharp changes in issues, party leaders, the regional and demographic bases of power of the two parties, and structure or rules of the political system (such as voter eligibility or financing), resulting in a new political power structure that lasts for decades.