Sources said JD(U) and RJD chiefs Kumar and Lalu Prasad respectively have asked their leaders to not comment against each other. The Congress too has conveyed to the Bihar chief minister that its leader Ghulam Nabi Azad's attack on him was avoidable.
"The Left leadership has worked for a truce as the infighting was not good for opposition unity. Our party will join opposition parties in the Monsoon Session to corner the government over a number of issues," JD(U) spokesperson K C Tyagi said.
To a question about whether his party will boycott the midnight GST launch event in Parliament if other opposition parties do so, he said it will take a call later.
The JD(U) had so far maintained that it will join the exercise as the GST bill was supported by almost the entire opposition and Bihar being a consumption state will benefit from it.
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He cited farmers' protest and incidents of lynching as among the major issues against the government.
The three-party alliance running the Bihar government had come under strain after Kumar lashed out at the Congress and the RJD when they projected opposition parties' joint candidate for the presidential poll Meira Kumar as 'Bihar ki beti' and asked him to reconsider his support to Kovind.
Some second rung RJD leaders took swipes at Kumar and things came to a head when Azad made a jibe, saying those with one principle take one decision and those with many take different decisions.
In retaliatory fire, Tyagi had yesterday wondered if the Congress wanted to shorten the alliance's life and recalled his party's "natural" ties with the BJP before Kumar decided to snap the alliance on ideological grounds.
The TMC-ruled West Bengal is seen as another anti-BJP bastion at a time when all other regional parties in power in states have supported the Union government on a host of issues.