We always maintain coalition dharma: Karunanidhi

"Any alliance DMK is in, we don't come out in haste or anger. We always maintain coalition dharma. Unless there is an ideological difference, we don't come out," he told reporters here.

With its 18 Lok Sabha MPs, DMK is one of the key supporters of the government at the Centre and is often described by Congress as a "valued ally".

The 88-year-old leader remained evasive on a possible cabinet reshuffle saying it was not his party's duty to fill vacancies, apparently referring to its quota of cabinet posts remaining vacant in the wake of the exit of A Raja and Dayanidhi Maran, both in connection with 2G spectrum allocation scam.

Asked if his party was eyeing the Railway portfolio in the wake of resignation of TMC's Mukul Roy, he said such matters were discussed only at DMK's General Council.

On the Cauvery row with neighbouring Karnataka, he said that state should not be adamant (on not releasing water) and called for stronger regulations at the national level regarding water-sharing disputes.