He was responding to a question from reporters near here on recent comments of Udhayanidhi, son of DMK working President and Alagiri's younger brother M K Stalin, that he was already in politics.
"Politics is a gutter and anyone can enter politics," he said.
Alagiri, Madurai-based elder son of DMK patriarch M Karunanidhi, was expelled from the party in 2014 on charges anti-party activities, capping the sibbling rivalry in involving him and M K Stalin.
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