Tamil superstar Rajinikanth cast his vote for the 2016 assembly elections on Monday morning. In Tamil Nadu, where power has oscillated between the AIADMK and the DMK over the last few decades, Chief Minister J Jayalalithaa is seeking a second successive term in office. Her biggest rival is 93-year-old M Karunanidhi, who is hoping to lead the other Dravidian giant, DMK, back to power.