When was the U.S. Republican party formed?
History of the United States Republican Party
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Reagan's influence upon the party persists as nearly every Republican Party speaker still reveres him. As such, social scientists Theodore Caplow et al. argue: "The Republican party, nationally, moved from right-center toward the center in the 1940s and 1950s, then moved right again in the 1970s and 1980s".[1]