Mutungamiri weDemocratic Party, Franklin D. Roosevelt (1933-1945), akawana zvikamu zviviri kubva muzvitatu zvezvigaro. VaDemocratic Party vaive nesimba panguva dzakasiyana-siyana mumakore gumi akatevera. Democratic Party yakachengetedza kutonga kweImba kubva muna 1955 kusvika muna 1995. Pakati pemakore ekuma1970, pakave neshanduko huru muImba, kusimbisa simba remakomiti madiki pamutengo wemachigaro emakomiti uye kubvumidza vatungamiriri vebato kuti vasarudze vatungamiriri vemakomiti.
kukanganisa hurongwa hwevakuru, uye kuderedza kukwanisa kwenhamba duku yenhengo dzepamusoro-soro kudzivisa mutemo