LAHORE: PML-N supremo Nawaz Sharif on Saturday accused incarcerated PTI founder Imran Khan of “backstabbing” him in 2013 by carrying out protest rallies despite initially assuring him of his cooperation post-elections. Addressing a meeting of the PML-N’s Central Working Committee (CWC) in Lahore, Nawaz said that upon assuming power in 2013, the first thing he did was go and visit Imran at …