[1] He was born to Baskaran and Gomathi in Manalikarai (Manalikkara), Kothanallur panchayat, division, Kalkulam taluk, Kanyakumari district, Tamil Nadu.
Sampath started his political career in Marumalarchi Dravida Munnetra Kazhagam (MDMK) in 1993, which he left in 2012.
He joined All India Anna Dravida Munnetra Kazhagam (AIADMK) in 2012.
[2] For a brief period in 2017 until 2018 he was with the AIADMK'S breakaway Amma Makkal Munnetra Kazhagam (AMMK).
He later joined and campaigned for the Dravida Munnetra Kazhagam (DMK) in the 2019 general elections.