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

One Tamil party, the Dravida Munnetra Kazhagam, pulled out of India's government this week, saying it was concerned India wasn't taking a hard-enough stance toward Sri Lanka.

WSJ: Sri Lanka to Face Rights Investigation

Confounding most predictions, another Congress ally, the Dravida Munnetra Kazhagam party, has clung on to win around half of 39 seats in Tamil Nadu, a state it swept in 2004.

ECONOMIST: India's election

Two weeks ago, the Congress party declared it would stop propping up the minority United Front government unless it dropped one of its coalition partners, the Dravida Munnetra Kazhagam (a regional party).

ECONOMIST: India