Su Venkatesan who contested from Madurai parliamentary constituency secured 4,47,075 (44 per cent) votes defeating his nearest rival (AIADMK candidate) by a margin of 1,34,119 votes." S. Venkatesan contested as CPI(M) candidate in the 2019 Indian general election from Madurai. He was elected to the Lok Sabha with a margin of 1.39 Lakhs of votes.