Ka cika wannan jumla: A lokacin da Ronald Reagan ya zama shugaban Amirka na 40 ya yi aiki daga
da farko rantsar a kan Janairu 20, 1981, har zuwa Janairu 20, 1989. Reagan, dan Republican daga California, ya hau mulki bayan nasarar da ya yi a kan shugaba mai ci na Democrat Jimmy Carter a zaben shugaban kasa na 1980. Shekaru hudu bayan haka, a zaben 1984, ya kayar da Democrat Walter Mondale don sake lashe zaben a cikin babbar ƙasa. Reagan ya gaje shi da mataimakinsa, George HW Bush, wanda ya lashe zaben shugaban kasa na 1988 tare da goyon bayan Reagan. Zaben Reagan na 1980 ya haifar da sauye-sauye mai ra'ayin mazan jiya zuwa dama a siyasar Amurka, gami da rashin amincewa da shirye-shiryen 'yanci, New Deal, da Great Society da abubuwan fifiko waɗanda suka mamaye ajandar ƙasa tun daga 1930s.