As part of the agitation, the Front decided to hold "people's trial" at panchayat level on March 7, Front convener Vaikom Viswan told reporters here after a state committee meeting of the LDF.
He said that Mani presenting the Budget in the Assembly was against the state's social and political culture and also a challenge to people in the state.
However, he said the Front had not taken any final decision on how to take on Mani in the Assembly session beginning on March 6.
The LDF has been boycotting Mani after a vigilance case was registered against him in connection with the bar scam, based on a complaint by a bar owner that the minister had taken bribe.
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The bar bribe scam pertains to graft allegation against Mani by a leading hotelier.
The Front also decided to extend support to the joint farmers' forum of rubber growers who were agitating against the 'wrong' economic policies of the state and central governments that had led to sharp fall in the prices of natural rubber, he added.