Pune: Former Union Minister and senior Congress leader Suresh Kalmadi passed away at around 3.30 am here today following  prolonged illness. He was 81. He is survived by his wife, son, daughter-in-law, 2 married daughters, a son-in-law and grandchildren. His mortal remains were kept at Kalmadi House in Erandwane, Pune, for public darshan till 2…