Khan was elected vice-chairman of Faridpur Municipality. In 1926, he got elected to the Bengal Legislative Assembly from Faridpur.[2] Khan left Congress in 1926 as he thought that the party was biased towards the Hindus He later became the secretary of the Anjuman-i-Islamia and subsequently joined the Muslim League.[2][6]
He competed on a Muslim League ticket in the 1937 election and defeated the Congressional candidate convincingly. Between 1937 and 1947, Khan served twice as Minister of Health, Agriculture, Industry and Education in Bengal.[6][8]
Khan created history when the Constituent Assembly was dismissed by Governor General Ghulam Mohammad in 1954. Khan challenged the dismissal in the court and the case was filed in the morning of 7 November 1954, by Advocate Manzar-e-Alam.[5] Although the High Court agreed and overturned it, the Federal Court under JusticeMuhammad Munir upheld the dismissal. He had been president of the Basic Principles Committee set up in 1949.
"Justice A. R. Cornelius was the sole dissenting judge in the landmark judgment handed down by the Supreme Court in the Maulvi Tamizuddin case. That judgment altered the course of politics in Pakistan forever and sealed the fate of democracy. The law had guided him as he had interpreted it and his conscience.".[9]
The decision to uphold the dismissal of the constituent assembly was to mark the beginning of the overt role of Pakistan's military and civil establishment in Pakistani politics.[10]
^For the Love of Cricket' by Omar Kureishi "For the love of cricket". Dawn Magazine. Archived from the original on 5 September 2008. Retrieved 15 December 2008.