Hadejia died on Friday at the Aminu Kano Teaching hospital, in Kano State after a brief illness.
He was a strong ally and loyalist of the president and was a deputy gubernatorial candidate of the defunct Congress for Progressive Change in Jigawa in 2011.
He was also the commissioner of commerce in Jigawa state.
While mourning the deceased, Buhari described him as a politician who understood the nuances of grassroots mobilisation.
“He left a legacy of versatile work. He was a towering grassroots politician. He dedicated his life to making his community and the nation better. May Allah accept his soul and grant those he left behind the fortitude to bear the loss,’’ Buhari said.