After his party’s stunning conquest of West Bengal, Narendra Modi stands at a juncture that would have seemed implausible mere months ago. The prime minister who lost his parliamentary majority in 2024, briefly inviting talk of a weakened leader, now controls roughly 70 per cent of India’s state legislatures through his ruling coalition, the National Democratic Alliance. The Bharatiya Janata Party’s (BJP) sweep of West Bengal, winning 207 of 294 assembly seats and ending three consecutive terms...