A court in Pakistan on Tuesday overturned the conviction of former prime minister Nawaz Sharif on the last of three graft charges, clearing the way for the pro-China leader to seek a fourth time. A two-judge bench at a high court in the capital Islamabad said the country’s anti-graft agency could not produce enough evidence to uphold Sharif’s 2018 conviction by a lower tribunal. “He [Sharif] has been vindicated,” his lawyer Azam Nazeer Tarar said after the verdict was announced. Sharif, who has ruled Pakistan three times in the past, was removed in 2017 by the country’s Supreme Court and was c…