Prime Ministers of India
JANATA PARTY (S)
BHARATIYA JANATA PARTY
SAMAJWADI JANATA PARTY
— In the timeline, years in black are Lok Sabha election years, and correspond to the year in which elected Prime Ministers came to power. The timeline starts the term of each Prime Minister on the date they were sworn in.
— The Prime Minister with the shortest term is Gulzarilal Nanda. Even though Atal Bihari Vajpayee resigned after 13 days, he continued to serve for three more till the next Prime Minister was chosen.
— Indira Gandhi was the only Prime Minister assassinated in office. Rajiv Gandhi was assassinated out of office while campaigning. The Indian National Congress had lost the previous elections.
— Only twice have governments fallen due to the loss of a vote of confidence. In all other cases the Prime Minister resigned when the coalition could not form a majority.
Data used here was obtained from the following:
Ramachandra Guha (2007). India after Gandhi: The History of the World's Largest Democracy. Picador. ISBN 9780330396103.
Penguin India Factfile, 2nd Edition (2008). Penguin Books. ISBN 9780143102472.