U.S. President Donald Trump's tirade against India over trade and Russian oil purchases threatens to undo two decades of diplomatic progress, analysts and officials say, and could derail other areas of cooperation as domestic political pressures drive both sides to harden their stances.

A bill vowing levies of up to 500% on countries that buy Russian oil is making its way through Congress. Meanwhile, the European Union’s 18th package of sanctions is due to ban refined products made from Russian crude in January.

President Trump accused India of aiding Moscow’s war on Ukraine by purchasing Russian energy, derailing trade talks between India and the United States.