Trinamool boss Mamata Banerjee on Tuesday declared her support to UPA nominees Pranab Mukherjee and Hamid Ansari for president and vice-president in a stunning climbdown which exposed the limits of her gunboat politics and that can boost the UPA's morale. Pledging support for Mukherjee whom she unsuccessfully tried to stall, Banerjee was candid in acknowledging that she was not happy about having to reverse her stand.