An all-out poster war has broken out in the Congress in Tamil Nadu, with supporters of the former Union Finance Minister, P. Chidambaram, and TNCC president E.V.K.S. Elangovan criticising each other across walls in several cities.br br On Sunday, both the factions took to the traditional campaign mode to speak out for their respective leaders. Walls in Tiruchi, Madurai, Erode, Chennai and Sivaganga were pasted with posters in which one faction condemned the other for bringing disrepute to the TNCC.