Trump's imposition of an additional 25% tariff on goods from India, coming into force on August 28, signals the most serious downturn in U.S.-India relations since his return to office in January, threatening to disrupt India's access to its largest export market.

Tariffs on Indian exports to the United States will surge to 50 percent by late August, as part of an effort by President Trump to pressure Russia into resolving its war in Ukraine.

US President Donald Trump warned Wednesday that more punishment was coming for countries buying Russian energy products after slapping a 25% tariff on India that is supposed to go into effect Thursday.