India’s biggest refiners are scrambling to secure non-Russian crude as U.S. tariff threats prompt a rapid shift in energy sourcing.

If Narendra Modi surrendered to President Trump, how tough would it be to wean his country from Russia’s discounted supply?

India, which gets more than a third of its oil imports from Russia, is likely to turn to supplies from the Middle East and Africa and other regions if it is forced to cut Russian imports due to possible U.