ISLAMABAD - Successful counter moves by PPP Co-Chairman Asif Ali Zardari in foiling attempts by some party MPs to create forward bloc in the Punjab Assembly was the chief reason for former foreign minister Shah Mehmood Qureshi to resign from his National Assembly seat. Well-placed political sources told TheNation on Monday that President Zardari has won over the support of all those party MPAs in the Punjab Assembly, who got frustrated ostensibly with the attitude of the Prime Minister and were struggling to create a forward bloc. Sources in the ruling PPP accused the former foreign minister of hatching conspiracy by instigating some MPAs from Multan division but timely moves by President Zardari foiled these efforts. Shah Memood Queshi has resigned after he was denied space to cause any dent to the party, a senior PPP leader said. On the other hand, some sources privy to these developments believed that Qureshi has resigned to fulfil conditions set out by Imran Khan for his entry into the PTI, which he would be joining on November 27. Despite PPP assertions that no other party MPs in the Parliament would follow Qureshis suit, there are indications that some MNAs from the PPP were sitting on the fence and might follow the course if the party leadership did not accept their demands. Interestingly, some sitting MPs from various parties other than the ruling PPP were also planning to resign from their National Assembly seats either to join the PTI or for an election alliance with PTI. Meanwhile, resignation of senior PPP leader Shah Mehmood Qureshi from the National Assembly has also alerted the main opposition party in the National Assembly PML-N, which is keenly taking stock of these developments. According to the senior party leaders, PML-N would not wait if 25 MNAs from other parliamentary parties resigned. Sources were of the view that PML-N can create major constitutional crises for the PPP-led ruling coalition for early general elections in the country if it decides to quit the parliament.