India, May 18 -- Tamil Nadu chief minister M K Stalin on Sunday wrote to his eight counterparts in non-Bharatiya Janata Party (BJP) ruled states, urging them to oppose the Presidential Reference sought by the Union before the Supreme Court.

Stalin sought their cooperation to "evolve a coordinated legal strategy before the court and present a united front". Stalin's letter comes days after President Droupadi Murmu on May 13 put forth 14 questions that deal with the constitutionality and reach of an April 8 judgement by the Supreme Court, setting deadlines for governors and the President for clearing state bills.

The top court's landmark verdict was based on a plea filed by the Dravida Munnetra Kazhagam (DMK)-ruled Tamil Nadu government a...