When was the U.S. Republican party formed?
History of the United States Republican Party
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]