Senior BJP leader and former union minister Pon Radhakrishnan was trailing by a margin of 1,11,491 votes against his rival Vijay Vasanth of the Congress in the Kanyakumari Lok Sabha constituency.
The bypoll was necessitated following the death of Congress-veteran H Vasantha Kumar last year due to COVID-19.
Vasantha Kumar's son Vijayakumar alias Vijay Vasanth is pitted against Pon Radhakrishnan who had earlier won from this constituency in 2014.
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According to Election Commission figures late afteroon, Vijay Vasanth has bagged 53.64% votes while Radhakrishnan 38.61%.
Of the 7,31,148 total votes polled on April 6, Vijay Vasanth has secured 3,92,202 while Radhakrishnan 2,82,278. The remaining votes were shared by the other 10 contestants, the election commission said.