The coming together of Nitish Kumar’s Janata Dal (United) and the Bharatiya Janata Party (BJP) in Bihar is unquestionably a seismic event in Indian politics. Mr Kumar’s election in 2015, in coalition with the Congress and the Rashtriya Janata Dal (RJD), led by his old rival, Lalu Prasad, was a humiliating defeat for the BJP. Now that the “grand coalition” of Bihar lies in tatters, the BJP has managed to reverse that defeat and, in the process, has justified its original, albeit questionable, claim during that Assembly election that it could provide stability. The most important fallout of the dissolution of the JD(U)-RJD-Congress alliance is that the very notion of Opposition unity has been discredited. After the Bihar election the idea took hold that a united Opposition could stand in the way of the all-conquering juggernaut that was Prime Minister Narendra Modi, Amit Shah and the BJP. This idea appeared to have a robust political history, too. In the past there have been instances of the Congress, when it had appeared similarly unstoppable, being upstaged by a more united Opposition. But the crucial requirement for the survival of such grand coalitions is that the various leaders of the Opposition are firmly together. In spite of the apparent bonhomie that accompanied their victory, the alliance between Mr Prasad and Mr Kumar became untenable after the string of corruption cases against the former.

