Rubuta ci gaba don wannan sakin layi - Ya tsaya ga Jam'iyyar Labour a cikin wurin zama mai aminci na Conservative na Gabashin Fife a cikin babban zaben 1970, ya rasa ga MP Sir John Gilmour. Ya zama dan majalisar dokoki na Stirling da Falkirk a zaben da aka yi a watan Satumbar 1971, bayan mutuwar Malcolm MacPherson. An sake sunan kujerarsa zuwa Stirling, Falkirk da Grangemouth don babban zaben a watan Fabrairun 1974; duk da sauye-sauye zuwa Scottish Nationalists, ya riƙe kujerar a watan Fabrairun da Oktoba 1974, amma tare da raguwar rinjaye. Harold Wilson ya nada shi Mataimakin Sakataren Harkokin Waje na Scotland tare da alhakin rarraba mulki da harkokin cikin gida, yana riƙe da wannan matsayi a ƙarƙashin Jim Callaghan yayin da gwamnatin Labour ta ci gaba da ba da shawara game da rarraba ikon Scotland. Zaben raba gardama a watan Maris na shekarar 1979
ya kasa wucewa da isasshen rinjaye. Gwamnatin Labour ta fadi a zaben 1979 na gaba, kodayake Ewing ya ci gaba da zama tare da mafi rinjaye. Ya zama mai magana da yawun gaban-bench a kan masana'antar Scotland a 1981. Ya zo na uku a zaben shugaban jam'iyyar Labour a watan Nuwambar 1981. An sake zabar kujerar sa a zaben gama gari na 1983, kuma an dawo da shi don kujerar magajin Falkirk East, kuma ya zama mai magana da yawun harkokin kasuwanci da masana'antu a karkashin Neil Kinnock. An sake zabarsa a 1987, kuma ya sauka daga matsayinsa na gaba. Ya kasance shugaban hadin gwiwa tare da David Karfe na Yarjejeniyar Tsarin Mulki na Scotland da aka kafa a 1989 don tsara shirin sake fasalin Scotland wanda aka tsara idan Labour ta lashe babban zaben 1992. Kungiyar kwadago ta rasa zaben, kuma an ajiye tsare-tsaren. Ewing ya yi ritaya daga Majalisar Commons a babban zaben 1992.