[1] Bello Hayatu Gwarzo was elected as senator in the 4th (1999–2003) and 5th (2003–2007) National Assemblies, representing Kano North Senatorial District.
[1] In April 2007 he ran again but was defeated by Aminu Sule Garo of the All Nigeria Peoples Party (ANPP).
In December of that year, Garo's election was annulled on the grounds that he had faked his educational qualifications and Hayatu took his place.
[3] Gwarzo again ran for reelection as Senator for Kano North on the PDP platform in April 2011, and was again elected, winning 204,905 votes.
Gwarzo again ran for reelection as Senator for Kano Noth on PDP platform in March, 2015 and was defeated by Barau Jibrinof the All people Congress.