Chennai, March 6 -- Even as the DMK has sealed the seat-sharing deal with the Congress after much wrangling, there is heartburn and disgruntlement among other allies like the Viduthalai Chiruthaigal Katchi (VCK) and the MDMK of Vaiko after the new entrant into the combine with much less vote share, the DMDK, being given a Rajya Sabha berth.

The VCK and the Left parties, fellow travellers with the DMK for long like the Congress, are also apprehensive that their share of seats, instead of being hiked this time, might be reduced than the last time to accommodate the DMDK and a few minor parties expected to join the alliance.

Including the minor ones, the DMK-led Secular Progressive Alliance (SPA), has 26 constituents in its ranks. This makes...