IT IS HARD to knock India’s political and business elites off-balance, but President Donald Trump is managing. In Delhi’s book-lined studies and the glass-walled corporate towers of Mumbai, grandees are suffering from vertigo. Normally, Indian diplomats and strategists take pride in being unshockable, remaining coolly transactional whatever a wicked world throws at them. But since Mr Trump’s return to office, elites are off-kilter.