MOSCOW (Reuters) -Russia accused the United States on Tuesday of exerting illegal trade pressure on India after U.S. President Donald Trump threatened again to raise tariffs on India over its purchases of Russian oil.

Russian oil exporters are predicted to take in $153 billion this year, according to the Kyiv institute. Fossil fuels are the single largest source of budget revenue. The imports support Russia’s ruble currency and help Russia to buy goods from other countries, including weapons and parts for them.

The US president threatened to "substantially" raise tariffs against India over its purchase of oil from Russia.