New Delhi, Oct 18 (ANI): Congress leader Ajay Maken on Saturday lashed out at the BJP for using the issue of black money for political gains. Taunting the BJP over the promises it had made to bring back black money to the nation from abroad, Maken said the way the BJP has used the issue for political gains, this has never been seen before. He further said that the Congress now wants to know, why was the BJP misleading the people of the nation? Yesterday, the Centre had told the Supreme Court that it cannot disclose the names of all those having black money stashed abroad as it violates the double taxation avoidance agreement.