Isnt Jayalalithaa locked up now? not sure how much Modi cares. But yeah I would be surprised if Tamil turnout goes above 15-20%.
Jayalalitha is out on bail. Modi seems to have a good relationship with Rajapaksa so he is not doing much. AIADMK and DMK are obviously raising a lot of noise over the Tamil issue but with DMK being so weakened in the 2014 election that it could not do much and AIADMK is to focused on keeping Jayalalitha out of jail. PMK is breaking with NDA/BJP/Modi over this so in that sense the BJP chance to take advantage of AIADMK and DMK weakness in TN is being lost. I guess Modi figured it is worth it to get a good regional partner in Rajapaksa.