Rubuta ci gaba don wannan sakin layi - A matsayin voivode, ya sanya hannu kan zaben Stanisław II Augustus a 1764, kuma daga baya ya zama jakadan Repnin Sejm
Ka yi haƙuri. Saboda adawarsa ga jakadan Rasha a can, an sace shi da mahaifinsa, Wacław Rzewuski a daren 13/14 ga Oktoba 1767 daga sojojin Rasha a ƙarƙashin jagorancin Janar Iosif Igelström kuma an daure su a Kaluga. Ya koma Poland a shekara ta 1773. A ranar 4 ga Satumba, 1775, duka sun karɓi fansa daga sarki na St. Stanislaus da White Eagle, amma wannan bai isa ya sasanta Seweryn ba, wanda ya zargi Poniatowski da wahalarsa.