1972
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Initiated as member in the Anna Dravida Munnetra Kazhagam (AIADMK) under the leadership of M.G.R., when he started the party.
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1972–1980
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District Student–Wing Secretary of AIADMK, of the combined districts of Ramanathapuram, Sivagangai and Virudhunagar under the leadership of M.G.R.
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1982–1984
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Union Secretary, Kalaiyarkovil, Sivagangai District under the leadership of M.G.R.
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1984–1987
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District Secretary, Sivagangai District under the leadership of M.G.R.
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1987–1989
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District Secretary, Sivagangai District of the AIADMK(J) headed by Selvi J. Jayalalitha.
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1989
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Contested the Tamil Nadu Legislative Assembly Election from the Thirupattur Constituency, Sivagangai District, under the Seval symbol of the AIADMK(J) headed by Selvi. J. Jayalalitha.
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1989–1991
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District Secretary, Sivagangai Disrtrict of the United AIADMK under the leadership of Selvi. J. Jayalalitha.
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1991
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Contested and Elected to the Tamil Nadu Legislative Assembly Elections from the Thirupattur Constituency, Sivagangai District, under the leadership of Selvi. J. Jayalalitha.[4]
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1991–1996
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Nominated to the Council of Ministers as Minister for Highways, Public Works Department and Electricity, Government of Tamil Nadu by Selvi. J. Jayalalitha. Held the post of Organizing Secretary of the AIADMK.
Then held the post of Treasurer of AIADMK under auspices of Selvi. J. Jayalalitha. He was given the title of "Computer Kannappan" by Selvi. J. Jeyalalitha for his efficiency in handling three major portfolios and conducting party activities.
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2000
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Started Makkal Tamil Desam Party in 2000 with more than 27 Lakh members and conducted a State Level Conference in Chennai on 23 December 2000 with around 25 Lakh members. And it was narrated as a huge conference in Tamil Nadu by all newspapers.
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2001
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Contested the Tamil Nadu Legislative Assembly Elections from Ilayankudi, Sivagangai District through his party Makkal Tamil Desam.
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2004
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Makkal Tamil Desam Party was in Third Front in the Local Body Elections conducted in Tamil Nadu and the party members won in many places. MTD Party led the Third Front in the Member of Parliament Elections held in 2004.
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2006
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Contested and Elected to the Legislative Assembly Elections from Ilayankudi Constituency, Sivagangai District.[10]
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2008
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Represented India to attend Commonwealth of Nations held at Canada.
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2008
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Member of Delimitation Committee.
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2009
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Joined AIADMK and was asked by Selvi. J. Jayalalitha to represent AIADMK in the Parliament by contesting the Loksabha Election held in 2009. He contested from Sivagangai Constituency and lost to the Congress Candidate P.Chidambaram. P.Chidambaram was declared the winner by a small margin of about 3400 votes. Even today, news articles (both print and video) announcing the details of the election and Kannappan's election petition against P.Chidambaram can be found on the internet. The case filed in 2009 is still unresolved though Chidambaram has completed his term as Lok sabha member from Sivaganga in May 2014.
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2011
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Contested the Legislative Assembly Elections from Thirupattur Constituency, Sivagangai District.
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2014
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Appointed by Selvi. J. Jeyalalitha as an incharge of AIADMK for Member of Parliament Elections to Southern Districts of Tamil Nadu which includes 10 constituencies.
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2016
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Appointed by Selvi. J. Jeyalalitha as an incharge of AIADMK for Legislative Assembly Elections of Tamil Nadu.
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