NEW DELHI: Split is wide open in CPM over a debate over fielding party chief Sitaram Yechury for a third term in Rajya Sabha.While the West Bengal unit of the party is understood to be keen to field Yechury to give the party a much-needed, articulate voice in Parliament, another section of CPM is not in favour of the proposal as it would require the party to take support from others like Congress.Since CPM lacks the numbers to send Yechury to Rajya Sabha on its own strength, it will have to lean on Congress for support. Congress is learnt to have offered support to the Left if Yechury is fielded.CPM has 26 MLAs in the West Bengal assembly, and Congress has 45. Polls to 5 RS seats will be held on March 26. While TMC can win 4 seats, it will fall short of votes for the fifth seat, leaving it open to the opposition.At a meeting of the party’s politburo, a section of CPM though came with a firm ‘no’ to any truck with Congress and thus objected to Yechury’s candidature.With March 13 as the last date for filing nominations, sources said Yechury had shot off a missive to the members of the politburo who had not attended the meet, seeking their opinion.