President Trump upended trade negotiations with India by making the purchase of crude oil a sticking point.

The president said Wednesday that imports from India would be subject to a 25 percent tariff as of Friday, as trade talks between the countries hit a stumbling block.

President Trump upended trade negotiations with India by making the purchase of crude oil a sticking point.

This comes as discounts narrowed in July and U.S. President Donald Trump warned countries not to purchase oil from Moscow, industry sources said.

The US leader added that he heard that but is unaware whether it is true or not

President Trump said last week that he would punish India if it did not cut off Russian oil imports, but he did not specify what the penalty might be.

Both state-run and private refiners in India are allowed to buy from their preferred sources, and crude purchases remain a commercial decision.