Kammala jumlar da ke gaba: Gummer ya kasance Sakatare mai zaman kansa na Majalisar Ministan Aikin Gona a gwamnatin Edward Heath, kafin a nada shi Mataimakin Shugaban Jam'iyyar Conservative <unk> matsayin da ya rike har zuwa faduwar gwamnati a shekarar 1974. Bayan dawowarsa zuwa majalisar a zaben 1979, ya rike mukaman gwamnati daban-daban kuma ya kasance Shugaban Jam'iyyar Conservative daga 1983 zuwa 1985 <unk> ofishin da ya yi a lokacin da aka yi watsi da mulkin mallaka.
Bam din otal din Brighton a lokacin taron jam'iyyar Conservative na shekarar 1984. Ya shiga majalisar a shekarar 1989 a matsayin Ministan Noma, Kifi da Abinci, ya zama Sakataren Harkokin Muhalli a karkashin John Major a shekarar 1993.