ISLAMABAD: Pakistan Muslim League Nawaz (PML-N) leader and former prime Minister Nawaz Sharif on Sunday asked Pakistan Peoples Party (PPP) leader Asif Ali Zardari to form a strong grand opposition alliance against the government of Pakistan Tehreek-e-Insaf (PTI). A delegation of PML-N under the leadership of Raja Zafarul Haq visited Nayyar Bukhari, secretary general of PPP at his residence to convey the message of PML-N leadership to PPP high up. According to the sources PML-N leadership with the help of PPP was desired of giving a tough time and strong opposition to the PTI government in and out if parliament. Nayyar Bukhari said that he would convey the message of PML-N to the party leadership and will inform about the decision after consultation with leadership. The PML-N has also offered joint candidates in the upcoming by-election. Senator Chaudhry Tanveer, Tariq Fazl Chaudhry and Anjum Aqeel were also present in PML-N delegation.