By-elections to five state assembly constituencies in Tamil Nadu, Bargur, Thondamuthur, Ilayankudi, Cumbum, and Srivaikuntam will be held on August 18 2009 ,Three political parties are boycotting the elections including AIADMK ,MDMK and PMK. ADMK leader J. Jayalalitha cited unreliability of Electronic voting machines as the reason for the poll boycott.Tamil Nadu Congress party leader K. V. Thangabalu said that ADMK chose not to contest polls for fear of losing them.
The election was necessitated after the previous winner M. Thambidurai was elected to the Lok Sabha in 2009 election. After the initial rejection of Desiya Murpokku Dravida Kazhagam (DMDK) candidate V. Chandran's candidacy, he was accepted to contest as an independent with Murasu as a symbol, which is the symbol of DMDK. Twenty four of thirty one nominations were rejected. Accepted nominations include K. R. K. Narasimhan (Dravida Munnetra Kazhagam), K. Asokan (Bharatiya Janata Party), S. Kannu (Communist Party of India), K. Padmarajan (Independent), Maheshwari Kannappan (Independent), S. Sakthivel (Rajini Fans Association) and A. Rajesh (Independent)
There are four candidated from recognised parties in contest in Thondamuthur constituency.Indian national Congress candidate M. N. Kandaswamy is contesting in Thondamuthur constituency.
Nine contestants are in fray in Ilayankudi constituency. They include three from major political parties, Suba. Mathiarasan of DMK, Azhagu. Balakrishnan of DMDK and P. M. Rajendran of BJP
11 candidates are in competition in Srivaikuntam constituency. Candidates from major politicial parties include M.B. Sudalaiyandi of Indian National Congress, G. Thanalakshmi of Communist Party of India, S. Santhana Kumar of Bharatiya Janata Party and M. Soundarapandi of Desiya Murpokku Dravida Kazhagam
15 candidates are contesting the election including four candidates representing political parties. the candidates include N. Ramakrishnan of Dravida Munnetra Kazhagam, M. Sasikumar of Bharatiya Janata Party, K. Rajappan of Communist Party of India (Marxist), R. Arun Kumar of Desiya Murpokku Dravidar Kazhagam and G. Ramaraj of Uzhaippali Makkal Katchi.