CHENNAI, June 29 -- More than 150 cadres of Vaiko-led Marumalarchi Dravida Munnetra Kazhagam (MDMK) joined the Dravida Munnetra Kazhagam (DMK) in the presence of party chief MK Stalin on Sunday. The development comes a day after the MDMK ended its long association with the DMK-led Secular Progressive Alliance alliance on Saturday. The MDMK functionaries hail from various districts, including Sivaganga, Tiruvallur, Virudhunagar and Tirupur districts strengthening the foothold of the DMK in these regions. The workers were inducted into DMK at Anna Arivalayam, the DMK headquarters in Chennai, a party release said on Sunday. Some of the key cadres who joined the DMK include Sivaganga district secretary Se Sevanthiyappan, Tiruvallur district sec...