Tamil Nadu's ruling DMK and Governor RN Ravi are at loggerheads, again. This time it is over Mr Ravi alleging Chief Minister MK Stalin used the state police force to deter vice-chancellors from attending a conference chaired by him in the hill-town of Ooty. Mr Ravi - whom the Supreme Court rebuked this month for withholding assent to 10 bills cleared, each twice over, by the Tamil Nadu government - declared Mr Stalin's behaviour was reminiscent of the Emergency imposed by late former Prime Minister Indira Gandhi.