AntÃ nio de Oliveira Salazar , GColIH , GCTE , GCSE , ( April 28 , 1888 â `` July 27 , 1970 ) was the Prime Minister and dictator of Portugal from 1932 to 1968 . AntÃ nio de Oliveira Salazar , GColIH , GCTE , GCSE ( ; 28 April 1889 -- 27 July 1970 ) served as the Prime Minister of Portugal from 1932 to 1968 .