Rubuta ci gaba don wannan sakin layi - McKee ya shiga Jam'iyyar Labour a 1980, ya bar a ƙarshen shekarun 1990. Ya koma siyasa a lokacin zaben raba gardama na Scottish Independence
a matsayin Daraktan Kasuwanci na Scotland, yin kasuwanci da tattalin arziki don kuri'ar "Ee". Bayan shiga SNP a watan Nuwamba 2014, an zaɓi McKee don yin takara a kujerar Glasgow Provan don Jam'iyyar a zaben Majalisar Scottish na 2016. Ya kasance Jami'in Hulda da 'Yan Majalisa ga Sakataren Majalisa na Tattalin Arziki, Ayyuka da Aiki na Gaskiya 2016-18.