Mamta Banerjee did not get even a minute to rejoice her party’s thumping victory by destroying the myth of Narendra Modi and Amit Shah’s invincibility. It was a high-voltage battle of nerves, fought over two months—one woman alone, with more than a little help from Prashant Kishor’s organisation—against the might of the party ruling at the Centre, which had so far exhibited nearly unchallenged authority across the country.