That All India Anna Dravida Munnetra Kazhagam general secretary Jayalalithaa won the support of the voters of Tamil Nadu for a second consecutive term as Chief Minister. AIADMK has defied the previous trends of six previous Assembly elections, which had voted out the incumbent. 
AIADMK secured 134 seats, 16 more than an absolute majority in the 234-member Assembly
Reasons for her victory
1.    Disunity in Unity: Particularly defection of important leaders from DMK and collapse of the third front led by the Desiya Murpokku Dravida Kazhagam in Tamil Naidu. 

2.    What separated the AIADMK from the DMK-led front was only 1.1 per cent of the total votes, but this was enough for a party to secure victory.

3.    Anti-incumbency was mitigated this time by a mix of populism and social welfare programmes initiated over the last five years. The AIADMK leader had expanded welfare measures by opening canteens with subsidised food, and selling everything from salt, bottled water, and medicines to maternity kits and cement at subsidised rates.