In the Name of Allah, the All-Beneficent, the All-Merciful.
May Allah bless Muhammad and his Family and damn their enemies.
Sheikh Yasser al-Habib explains a statement from Umar claiming that the Prophet (peace be upon him and his family) wanted Imam Ali (peace be upon him) to be his successor, but that Allah did not want so. The Sheikh explains how this is clear disbelief from the mouth of Umar.