THE UPA government is faced with the task of reconciling its own interests in poll-bound Karnataka and that of the DMK regime in Tamil Nadu on the Hogenakkal falls issue. As if to play out this tough choice facing the Congress leadership, Shipping minister and senior DMK leader T R Baalu called on Prime Minister Manmohan Singh on Wednesday and urged him to advice the Karnataka government not to oppose the Tamil Nadu drinking water project. Ahead of him, former Karnataka chief minister and senior Congress leader S M Krishna met Mr Singh and requested the Centre to