The party was founded and led by Namgay Tsering and Kazi Lhendup Dorji.
[3] The party was launched ahead of the November 1958 election, formed after a split from the Sikkim State Congress.
[5] Kazi Lhendup Dorji contested the November 1958 election, but lost his seat.
[4] Swatantra Dal took part in a conference, together with the Sikkim National Party, Sikkim State Congress and the Scheduled Castes League, held in Melli September 24-25, 1959.
[5] In May 1960 Kazi Lhendup Dorji founded a new party, the Sikkim National Congress.