The party also warned that there will be no transaction of business during the forthcoming Monsoon session of Parliament if External Affairs Minister Sushma Swaraj and Rajasthan Chief Minister Vasundhara Raje are not made to quit.
"I think this (BJP defence of Raje and Swaraj) is a blunder the Prime Minister has done by extending support to these leaders. This cover up is now going to cost him heavily.
He was replying to a question on BJP defence today of Swaraj and Raje for their role in helping tainted former IPL chief Lalit Modi in staying in Britain after maintainiung two days of studied silence.
"Had it not been so, he would have and he should have taken the action by now," the senior Congress leader said.