Nanjangud, about 20 kilometres from Mysore in Karnataka, is known for its Shiva temple and bananas. The town is now witnessing a bypoll battle between a former Congressman who joined the BJP, and the ruling Congress itself - right in Chief Minister Siddaramaiah's stronghold. With elections due in Karnataka next year, the results could be seen as a test of the chief minister's popularity as he leads the party into the election in one of the few states where the Congress is in power. And the BJP is making it a fight.