DMK president M Karunanidhi wrote to various parties, including main opposition DMDK, CPI-M and CPI, Congress, BJP and even PMK, which had walked out of his party-led alliance after the 2011 elections, seeking support.
In identical letters to Vijayakant (DMDK), G Ramakrishnan and D Pandian (secretaries of CPI-M and CPI) and TNCC president B S Gnanadesikan among others, Karunanidhi sought their support to oppose "AIADMK's anti-democratic activities."
The bypoll is necessitated following the death of AIADMK MLA C Perumal.