Karunanidhi entered the 50th year as DMK chief on Friday, becoming the first leader to enter the 50th year as the president of a political party. He has been chief minister five times, with the last one in 2006. He retreated from mainstream politics in 2016. By trumping his high-profile contemporaries and detractors in the party, he had taken on the reins on July 27, 1967 following the demise of the party's founder and late Dravidian great CN Annadurai.