Islamabad: A close aide of slain former premier Benazir Bhutto has resigned his basic membership of the ruling Pakistan People's Party days after he was suspended by the party for meeting main opposition PML-N chief Nawaz Sharif.

Enver Baig tendered his resignation in a letter sent to PPP secretary general Jahangir Badar.

In the letter, Baig said he had the right to appeal the suspension of his basic membership but would prefer to quit the PPP.

Baig, a former parliamentarian who was denied a ticket in elections to the Senate in 2009 after he was sidelined by PPP chief and President Asif Ali Zardari, said in his letter that he owed his debut in public life and all his accomplishments in his political career to Bhutto.

"With her uncanny sagacity, worldly wisdom and matchless political acumen, she brought to the task of running both party and government a repertoire of superb accomplishment which endeared her and the party to the broad masses of the people," Baig said.

However, after her death in 2007, Baig said he had found it difficult to continue his association with the PPP.

Baig had played a key role in shaping the PPP's stand on foreign policy issues in the era when Bhutto was living in self-exile.

He also played a key role in secret negotiations between Bhutto and the US that eventually allowed her to return to Pakistan from self-exile in late 2007.

He was sidelined by Zardari because of his support for PPP leader Makhdoom Amin Fahim when the latter sought to project himself as a candidate for the post of prime minister after the 2008 general election.

Reports have suggested that Baig will soon join the PML-N.