Islamabad [Pakistan], May 19 (ANI): Pakistan Muslim League-Nawaz (PML-N) supremo Nawaz Sharif accused Pakistan Tareek-e-Insaf (PTI) founder Imran Khan of ‘backstabbing’ him in 2013 by carrying out protest rallies despite assuring him of cooperation after elections, reported Dawn. Addressing a meeting of the PML-N’s Central Working Committee (CWC) in Lahore, Nawaz said upon assuming power in 2013, he visited Imran at his residence in Banigala and they agreed on a working relationship for the country’s sake. Nawaz further said Imran, thereafter, went to London along with other political leaders …