On 26 November 2007, Mustafa quit the Pakistan People's Party (PPP) and joined the Pakistan Muslim League (F) (PML-F).[1]
Mustafa contested the 2008 Punjab provincial election from PP-293 Rahim Yar Khan-IX as a candidate of PML-F, but was unsuccessful. He received 11,526 votes and was defeated by Javid Akbar Dhillon, a candidate of PPP.[2]
On 31 January 2010, he was elected Vice Chairman of Punjab Bar Council for a one-year term.[3] On 20 March 2016, he was elected as Chairman of the Executive Committee of Punjab Bar Council for a one-year term.[4][5]
In the lead-up to the 2024 Pakistani general election, a police case with Anti-Terrorism provisions was filed against Mustafa and his colleagues in January 2024 for allegedly attacking the Assistant Returning Officer of NA-171 Rahim Yar Khan-III. According to reports, he requested the return of his election nomination papers and also demanded to replace his documents from Pakistan Tehreek-e-Insaf (PTI) to Pakistan Tehreek-e-Insaf Nazriati (PTI-N) and insisted on being allotted the symbol of PTI-N. According to the report, Mustafa and his colleagues threatened the Assistant Returning Officer and his staff with dire consequences.[6][7]
He was elected to the National Assembly of Pakistan as an independent candidate supported by PTI from NA-171 Rahim Yar Khan-III in the 2024 Pakistani general election.[8] He received 103,834 votes and defeated an independent candidate, Hashim Jawan Bakht, who secured 56,028 votes.[9]
