text: Reduction of presidential powers In late November 2009, Zardari ceded to Prime Minister Gillani the chairmanship of the National Command Authority, Pakistan's nuclear arsenal oversight agency.
  In December 2009, the Supreme Court ruled that the National Reconciliation Ordinance amnesty was unconstitutional, which cleared the way for the revival of corruption cases against Zardari. Although Zardari had immunity from prosecution because he was president, the end of NRO and his earlier corruption cases challenged the legality of his presidency. Calls for his resignation escalated. Zardari, who rarely left the Aiwan-e-Sadr presidential palace, responded with a nationwide spurt of speeches in January 2011. In January 2010, the Supreme Court ordered Pakistan's government to reopen Zardari's corruption charges in Switzerland. However, Zardari prevented the MQM-leaning Attorney General, Anwar Mansoor, from filing charges, so Mansoor resigned in protest in early April. That same month, Zardari won a key victory against the judiciary over his corruption trials when Geneva Attorney General Daniel Zappelli stated that Zardari can not be prosecuted under international laws because of his presidential immunity. Zardari was supported by Prime Minister Gilani, who defied the Supreme Court order.
  In February 2010, Zardari sparked a standoff by attempting to appoint a Supreme Court candidate without the court's approval, but the confrontation ended after he backed down and nominated a candidate acceptable by the court.