Sitaram Yechury, member of the Polit Bureau of the Communist Party of India (Marxist), filed his nomination papers here on Friday as the candidate of the Left Front for re-election to the Rajya Sabha from West Bengal.

Given its reduced strength in the Assembly, the Left Front — with a total of 61 seats — is in a position to be assured of only a single seat, out of the six from the State for which elections are slated for July 22.

On his seeking re-election, Mr. Yechury said: “The party [CPI-M] has given me a very big responsibility, considering the political situation in the country and in West Bengal. I will try my best to fulfil it.” Meanwhile, Sukhendu Shekhar Roy left the Congress and was nominated as the fourth candidate of the Trinamool Congress.

The Congress and the Trinamool have an alliance in the State. The other three nominees of the Trinamool, which has a strength of 186 seats in the 293-member Assembly (a legislator of the CPI (M) died in May), are former IAS officer Debabrata Bandhopadhyay, a vice-president of the party, Derek O'Brien and Srinjoy Bose, the editor of a local daily.