In the last state election, the Congress was given 48 seats.
This deal comes after high-level negotiations through the day. A third round of talks held late last night had failed and Ghulam Nabi Azad - the Congressman in charge of Tamil Nadu - skipped a scheduled meeting this morning with DMK chief Karunanidhi.
Currently the Congress supports the DMK government in the state. If the alliance wins the election, the Congress wants to be included in the government.