US President Donald Trump doubled tariffs on Indian goods to 50% as a penalty for its purchases of Russian oil, escalating a fight with a key Asian partner and sparking outrage in New Delhi.

India, which now faces among the highest tariff rates imposed by the US, called the levy "unjustified and unreasonable".

As the president pursues his goals on Russia and trade, America’s relationship with an important partner in Asia could end up as collateral damage.