On 15 August 1947, he was appointed as the first
Chief Minister of West Punjab in Pakistan. Having foregone his constituency in
Firozepur district and extensive estates in
East Punjab, Mamdot sought to rebuild his powerbase in Pakistan. Without official sanction, he created the Allotment Revising Committee to cultivate new followers amongst refugees, and allegedly siphoned off properties and cars to his followers and former tenants. It was alleged he used public funds to personally acquire about 2,000 acres of prime agricultural land at nominal rates in
Montgomery District, that he awarded to his brother several hundred acres of land in the same district that belonged to
Sir Khizar Hayat Tiwana and that he secretly deposited over 100,000 rupees from the Kashmir fund into his brother's account. As no one was able to form a new ministry, the Governor of West Punjab assumed direct control of the province. In 1950, he left the Muslim League to form a new party, the
Jinnah Muslim League, which contested the
1951 elections against the Muslim League led by his arch-rival
Mumtaz Daultana. ==Later life and death==