Thus the Nasibis might claim that this happened after Imam...

Thus the Nasibis might claim that this happened after Imam Hasan (as) was martyred but the fact is Mu'awiya sought to secure the bayya for Yazeed whilst Imam Hasan was alive We read Al Imama wa al Siyasa page 155 Dhikr bayya Yazeed "An Iraqi tribal chief said to Mu'awiya 'As long as Hasan is alive the people of Iraq and Hijaz shall not give bayya to Yazeed." Mu'awiya had potential successor and rival Abdur Rahman bin Khalid poisoned We read in al Istiab Volume 2 page 400 : "Mu'awiya said to the people of Syria, 'I want to appoint a successor over you and need your advice'.