He recorded a landslide victory in an open ballot election conducted on the floor of the Senate on Tuesday to elect leaders of the new Senate. He polled 79 of the total 107 votes.
His opponent, Mohammed Ali Ndume, also of APC has 28 votes.
Lawan is the preferred candidate of the All Progressives Congress (APC) and President Muhammadu Buhari.
He was nominated by senator-elect Yayaha Abdullahi and seconded by Solomon Adeola Olamilekan both of whom are of the All Progressives Congress, APC, from Kebbi and Lagos States respectively.