Bihar election results: With a lot at stake, was BJP defeated by anger?

Bihar has spoken and BJP has lost an election that it had staked a lot on and thrown everything at. It had used its trump card Narendra Modi extensively, it had used the Amit Shah brand of the detail–oriented tactical campaign mounted with granular finesse, it had thrown the cow and the politics of religious polarisation in for good measure, and it has come up spectacularly short.