Six-decade DMK-AIADMK dominance faces disruption in Tamil Nadu Chennai: If actor-turned-politician ‘Ilayathalapathy’ Vijay’s Tamilaga Vettri Kazhagam (TVK), which has emerged as the single largest party in early trends in Tamil Nadu and is within striking distance of the halfway mark, manages to sustain its lead, it could mark a watershed moment not just for the…