Hisar (Har), Oct 12 - With Anna Hazare factor looming large raising stakes for the ruling Congress, the stage is set for a triangular contest in the bypolls for Hisar Lok Sabha seat to be held tomorrow. There has been a fortnight of frenzied campaigning as heavyweights find themselves locked in a keen contest, which has been overshadowed by Hazare's call to voters to shun the Congress and inflict a "historic defeat" for its failure to bring the Jan Lokpall Bill in Parliament.