F or more than two decades, Washington and New Delhi built a strategic partnership that was hailed as one of the great success stories of post–Cold War diplomacy. Today, that relationship is facing its most serious test in years — and India is signaling it has other options.

Peter Navarro, Donald Trump’s chief trade adviser, has slammed India, dubbing it a ‘maharaj in tariff’ and accusing it of running a ‘profiteering scheme’ through discounted Russian oil. From his Harvard roots to his prison stint and return to Trump’s inner circle,