"No one is bigger than the party and its ideologies. If oppurtunist people leave the party it is good for the party itself. He (Udayan Guha) has not only betrayed the party but has also betrayed the masses," Biswas told reporters.
"His switching over to TMC would only help AIFB consolidate its position in Coochbehar. None of the district committe members of AIFB has gone with him," Biswas said.
He had time and again expressed displeasure over the functioning of AIFB's top leadership.
Guha will function as a secretary of TMC and function from the same constituency in next year's state assembly polls, Chief Minister Mamata Banerjee had said yesterday.