ISLAMABAD: The National Assembly on Wednesday passed the 27th Constitutional Amendment Bill during a ruckus-marred session attended by political heavyweights, including Prime Minister Shehbaz Sharif, PML-N President Nawaz Sharif and PPP Chairman Bilawal Bhutto-Zardari. The bill was passed by a two-way voting process — voting by division and clause-by-clause voting. Presented in the house for voting by Law Minister Azam …