The key political players in Himachal Pradesh state in north-west India are the Indian National Congress and Bharatiya Janata Party. The politics of Himachal Pradesh are more associated with the regional divides of the state. Based on electoral divide, the state can be divided as - Upper Himanchal consisting the districts of Shimla, Sirmaur and parts of Mandi, Kullu, Lahaul and Spiti, Solan, Kinnaur and Chamba; and Lower Himachal consisting the districts of Kangra, Hamirpur, Bilaspur, Una and the lower region of Mandi district.The State was reorganised on 1966 through the Punjab Reorganisation Act by adding some parts of Punjab to the state of Himanchal Pradesh; and the parts of old Himachal and the newly merged areas too differ in their voting pattern. (en)