Siddiqui was elected the chairman of the Bihar Cricket Association in September 2015 defeating former association president Vinod Kumar. He is also the head of the Bihar Badminton Association. He is known to be a close associate of Lalu Prasad Yadav. When asked in 2009, to contest the Madhubani Parliamentary Elections, he filed his nomination and unsuccessfully contested, losing by the margin of 10k votes, which led to trailingredients of Dr. Shakeel Ahmed to 3rd position. He again contested 2014 Madhubani Loksabha elections unsuccessfully losing to veteran BJP leader Hukumdev Narayan Yadav by a margin of 15k votes. He is 7th time MLA. Previously he used to contest from Bahera. After delimination of that constituency, he contested from Alinagar.
Abdul Bari Siddiqui representing JP defeated Harinath Mishra of Congress in 1977 from Bahera, which was the first time he became an MLA.[6] Siddiqui has won 7 times as a Member of Bihar Legislative Assembly.
His son, Anis Bari is currently a MC/MPA 2023 candidate at Harvard Kennedy School, is an author and entrepreneur who runs an Ed-tech start-up based in Delhi.[7][8]