Orai: Coming down heavily on the Congress, Uttar Pradesh chief minister and BSP supremo Mayawati on Saturday alleged the maximum black money in foreign banks was that of Congress leaders. Addressing an election meeting, she dared Congress president Sonia Gandhi and her party's general secretary Rahul Gandhi to make public names of those having accounts in the foreign banks. Both did nothing to bring back the black money stashed abroad, Mayawati said.