NEW DELHI: West Bengal CM Mamata Banerjee has become a “law unto herself”, BJP said Sunday, claiming that her allegation that the party was using President Droupadi Murmu for political reasons stemmed from a guilty conscience. “It is shameful and nonsense to comment that we are using the President,” BJP’s Ravi Shankar Prasad said, emphasising that there was nothing political about the Santhal conference Murmu was attending in West Bengal, which sparked the controversy.Mamata now fears that Santhals are angry over the way she treated the President and the way the tribal event was organised, and this is behind her allegations, he said.He said the CM should stop talking about saving the Constitution if she “cannot respect” the President of the country. “Under Mamata Banerjee’s rule, only ‘ghuspaithiye’ (infiltrators) are welcomed. Doors are open for them,” Prasad said.