Noted thinker S Gurumurthy in a special conversation with NDTV's Editor-in-Chief Sanjay Pugalia discussed Prime Minister Narendra Modi's big push in Tamil Nadu in these elections. He says DMK's politics has run its course and there is a fatigue factor. Mr Gurumurthy pointed out that the DMK provoked PM Modi with the "go back Modi" slogan and the Prime Minister is not known to take provocations lightly.