LAHORE, May23(ABC): Punjab Police late Monday raided the houses of several PTI leaders, including former energy minister Hammad Azhar, Usman Dar, and Babar Awan, while a police constable was also shot dead during a raid in Lahore. The development comes hours after PTI’s Senior Vice President Fawad Chaudhry, in a press conference, warned the government against using force to stop …