10 Facts About The RK Nagar By-Election:

• Some exit polls had indicated an edge for TTV Dhinakaran, which seems to be coming true as Mr Dhinakaran increases his lead over AIADMK's Madhusudhanan and DMK's Marudhu Ganesh in the high-profile RK Nagar bypoll. Despite trailing, the ruling AIADMK and the opposition DMK have expressed confidence that they would win the seat.
• Jayalalithaa represented the seat twice and it is crucial for her party, the ruling AIADMK, to retain it to establish that Chief Minister E Palaniswami and his team are in control. The party fielded veteran E Madhusudanan, who held the seat earlier and has influence among Telugu people who have a sizeable presence in Chennai's RK Nagar.
• VK Sasikala, who is currently in jail in a corruption case and her nephew TTV Dhinakaran, had been fighting for control of the ruling party but lost to Chief Minister E Palaniswami (EPS) and his deputy O Panneerselvam (OPS).
• TTV Dhinakaran was evicted along with VK Sasikala following a deal between AIADMK's factions led by Mr Palaniswami and former Chief Minister O Panneerselvam as they merged in August. Mr Dhinakaran and Ms Sasikala have challenged that decision and claim to lead the real AIADMK, though their support within the party is dwindling.
• During the campaign in Chennai's RK Nagar, the AIADMK accused Team Sasikala of hiding the facts of Jayalalithaa's illness and death. They countered the charges by releasing a video of Jayalalithaa at the hospital to establish that she was alive and recovering. However, the Election Commission ordered TV channels to take the video off air, calling it a violation of the poll code.
• Earlier this month, TTV Dhinakaran had lost the AIADMK's 'two-leaves' election symbol to the faction led by chief minister E Palaniswami and his deputy O Panneerselvam after the Election Commission recognised them as the "real" party. The sidelined AIADMK leader contested with a 'pressure cooker' as his election symbol.
• The RK Nagar by-election was shadowed by allegations of bribing voters with cash and gifts. The Election Commission, however, had refused to postpone the election despite pleas from the opposition DMK.
• The RK Nagar bypoll was postponed in April this year over allegations that the faction of jailed AIADMK leader VK Sasikala paid Rs. 89 crore to voters to buy support for its candidate and her nephew TTV Dhinakaran.
• Making it a triangular contest, the DMK fielded Marudhu Ganesh, a little-known lawyer but an RK Nagar local who is seen by many as a strong candidate.
• While the BJP has fielded a candidate too, the Left parties and the MDMK are supporting the DMK, which wants to win RK Nagar to deliver a big psychological blow to the AIADMK and reinforce its claim that the ruling party has lost popular support after the death of Ms Jayalalithaa only months after she led her party to a big win in the assembly elections last year.