ISLAMABAD, Nov. 29 (Xinhua) -- Pakistani President Asif Ali Zardari Sunday telephoned Pakistan Muslim League-N (PML-N) chief Mian Nawaz Sharif and extended Eid greetings to him.

    Local TV channels quoted presidential spokesman Farhatullah Babar as saying that both leaders exchanged views on the national political scenario.

    In their eight-minute telephone call, they agreed that enactment of the constitution is essential for the national solidity.

    Meanwhile, Shehbaz Sharif, Nawaz's brother and Chief Minister of the Punjab province advised Zardari to repeal the 17th amendment of the constitution and uphold his promises to enact the Charter of Democracy.

    Talking to newsmen after inquiring about health of the patients admitted in a hospital in the eastern Pakistani city of Lahore, Shehbaz said that Zardari has twice announced to repeal the 17th amendment, but broke his promises in broad daylight.

    Shahbaz's statement comes a day after the expiration of the National Reconciliation Ordinance (NRO), an amnesty protecting Zardari and several allies from graft prosecution. Zardari enjoys general immunity from prosecution as president, but the Supreme Court could challenge that.

    On Friday night, Zardari divested himself of the powers of chairman of the National Command Authority (NCA) and transferred these to Prime Minister Yousuf Raza Gilani.

    This means that command of Pakistan's nuclear arsenal is now in the hand of the prime minister.

    Zardari also promised that the 17th amendment will be repealed next month.

    "We always wanted to do away with the 17th amendment, but we wanted to do it through a unanimous decision because the 1973 constitution was also approved unanimously," he said.

    Following the expiration of the NRO, Zardari is under increasing pressure for him to step down.

Special Report: Pakistani Situation