[3] Keishing participated in the Freedom Struggle; including attending meetings as a student, during the period of 1945-47.
[5] During his second term in the Lok Sabha, he informed Prime Minister Jawaharlal Nehru that he wanted to join the Indian National Congress and remained with the party until his death.
[citation needed] Keishing, along with D. Athuido, a former Member of the Legislative Assembly, was expelled from the Manipur Congress for six years in May 1968 for signing a memorandum to the Prime Minister of India which suggested that the Naga-inhabited areas of Manipur should be merged with Nagaland.
[8] In 2014, Keishing declared that he would not contest the Rajya Sabha elections after serving two consecutive terms.
He died on 22 August 2017, aged 96 at Regional Institute of Medical Sciences Hospital, Imphal, Manipur.