Congress president Mallikarjun Kharge and former Congress chief Sonia Gandhi will address leaders in Chhattisgarh, as well as political, economic and international affairs resolutions will be deliberated upon at the party's 85th plenary session today. At the start of the second day of the three-day conclave, the Congress president will release a book and party general secretaries will submit their respective reports. After this Mr Kharge will address the gathering.