It's often proved that TN governments, Let that be DMK or AIADMK, never have respect to National policies. They pave their own way and don't mind even toppling Union govt for their narrow selfish political gains.
A stong regional and language feeling among tamilians doesn't let any national party to step in the state, Which is a bad taste and not a good sign to political stability.
I hope the change first comes in the mindset of ppl there. Then naturally ppl like jayalalita and karunanidhi will learn some respect towards Indian constitution.