 Since India's Independence on 15 August 1947, Indian National Congress, the major political party instrumental in Indian independence movement, ruled the nation.The first Prime Minister Jawaharlal Nehru, second PM Lal Bahadur Shastri and the third PM Indira Gandhi, all were from the Congress party.However, Raj Narain, who had unsuccessfully contested election against Indira from the constituency of Rae Bareilly in 1971, lodged a case, alleging electoral malpractices.