The top lawmaker also rebuffed prayers for the declaration of Danbaba's seat vacant, saying his defection is valid and excusable under the law.
The former speaker who held sway as speaker of the green chamber from 2015 to 2019, rejoined the ruling party in 2020 and mentioned a breakdown of governance in his native state of Bauchi as reason for defecting.
They both said their defection is in accordance with the letters and spirit section 109 (1) (g) of the Constitution of the Federation Republic of Nigeria, 1999 as amended.
Mr Osinbajo declared interest in next year's race on Monday after meeting with state governors of the party Sunday night.
He said that the development of the transport sector by knowledge transfer and capacity building would generate employment opportunities for Nigerians.
Only the 44 bills were passed out of 68 considered by the lawmakers in the Constitution Amendment process.
Mr Malami had last week noted that the verdict of the lower court will be enforced, a decision that has drawn criticism from Nigerians.
Staff members were turned back from the premises while being cautioned not to loiter around.