Chandigarh, July 02, Monday 2018 (kulbir singh kalsi): The Aam Aadmi Party on Monday held a demonstration sit-in at Chandigarh on the issue of rising problem of drugs in Punjab. AAP workers assembled at the MLA hostel under the leadership of MP Bhagwant Mann, the leader of opposition Sukhpal Singh Khaira, co-president Dr. Balbir Singh and MP Prof. Sadhu Singh. As the protesters started marching towards the residence of CM Capt.