Rubuta ci gaba don wannan sakin layi - A ranar 30 ga Agusta, 2020, ƙungiyar Future Movement of Lebanon da gungun tsoffin firayim ministocin Lebanon sun goyi bayan sa don karɓar mukamin PM. An zabi shi ne a matsayin mukamin yayin da yake aiki a matsayin jakadan Lebanon a Jamus don maye gurbin Hassan Diab wanda ya yi murabus a ranar 10 ga Agusta 2020 saboda kuka da tashin hankali bayan fashewar Beirut a shekarar 2020.
wanda ya kashe kusan mutane 200. An bayar da rahoton cewa Mustapha ya sami goyon baya daga manyan jam'iyyu kamar Free Patriotic Movement don kafa sabuwar majalisar ministoci. Tsohon Firayim Minista Najib Mikati ya zama dan siyasa na farko da ya zabi Mustapha Adib a matsayin mukamin. Shi ne kuma dan takara daya tilo da aka tsayar don mukamin a ranar 30 ga Agusta 2020 kuma an bayar da rahoton cewa Shugaban Faransa Emmanuel Macron ya amince da nadin nasa wanda ya isa Lebanon don tattaunawar zaman lafiya da tattaunawa game da sauye-sauyen siyasa a Lebanon. A ranar 31 ga Agusta, 2020, an nada shi a matsayin sabon Firayim Ministan Labanon a ranar da ta gabata kafin ranar ƙarshe (1 ga Satumba, 2020) da Shugaban Faransa ya kafa wanda ya buƙaci canjin siyasa a cikin ƙasar ba tare da cin hanci da rashawa ba. An nada shi 'yan sa'o'i kadan kafin ziyarar Emmanuel Macron. Ya sami goyon baya daga 90 daga cikin 'yan majalisa 120 don zama sabon Firayim Ministan Lebanon kuma ya kafa gwamnati a ranar 31 ga Agusta 2020.