Congress leadership's conundrum over presidential poll was compounded on Monday, with two of its probable candidates — finance minister Pranab Mukherjee and Vice-President Hamid Ansari — unable to get past the resistance of crucial partners and supporters. If finance minister Pranab Mukherjee, widely seen as leading the race for Congress nomination, and Trinamool boss Mamata Banerjee remained deadlocked over the latter's pressure for a special central financial assistance for West Bengal, SP boss Mulayam Singh Yadav repeated his reservations about Ansari, the other name on Sonia Gandhi's list for the Rashtrapati Bhawan.