The All India Anna Dravida Munnetra Kazhagam, the ruling party in the state, has been staunchly demanding steps against Sri Lanka.

WSJ: India Party Pulls Support From Government

Recent grumbling from Congress's two biggest allies, West Bengal's Trinamul Congress (TC) and the Dravida Munnetra Kazhagam of Tamil Nadu, have raised fears of this.

ECONOMIST: Indian politics and women

One government ally, the Dravida Munnetra Kazhagam party, opposes FDI in retail but says it's unwilling to walk out of the coalition over the matter.

WSJ: Singh Defends Retail FDI Amid Furor