Bihar, on the eve of the polls, is a carnival of hoardings, a cacophony of speeches, a collation of rallies, a stream of allegations and counter-allegations. Beneath this fervid electoral energy, there is at stake not only the future of Bihar but also, in a sense, the future political narrative of India. For the BJP, a Bihar win would prove an endorsement of Narendra Modi’s brand of politics, a doorway to victories in the polls to follow in Uttar Pradesh, West Bengal and Assam. For the JD(U) and its allies, the RJD and the Congress, victory will signal the first roadblock to the Modi rollercoaster. It will also signal the beginning of changes in the BJP and colour the results of the 2019 general elections.