JAMMU: The differences between the ruling Pakistan Muslim League-N and Pakistan Peoples Party (PPP) are deepening with every passing day. Over the past month or so, the PPP has, on many occasions, ditched the government at crucial moments leaving it red faced and stranded. By all available indications, it seems Prime Minister Shehbaz Sharif is in for tougher days ahead because of this. When the proceedings of the National Assembly began some day…