Though Mulayam Singh Yadav (Samajwadi party chief) and Lalu Prasad (RJD chief) are at the forefront of the merger, they have constantly been at loggerheads with each other, an editorial in party mouthpiece 'Saamana' said.
"Both are relatives now (referring to marriage of Yadav's nephew with Lalu's daughter) but the question is for how long can two swords stay in one sheath," it said.
Sena said that leaders of these political parties have failed to win confidence of their own party men.
"Ramgopal Yadav (SP leader) has stayed away from the meetings. Pappu Yadav (of RJD) too seems to be against this alliance. It remains to be seen that what will be the objections by these leaders turn out to be in future," it said.
Questioning the future of 'Janata Parivar', formed by the merger of six parties with socialist roots, Sena said an amalgamation of this kind has been tried in the past but it only proved to be a failure.
Sena in the edit piece said: "Political parties since 1970 have tried to create a third front but it has resulted in their own destruction and they had no choices but to join as an alliance with Congress.