Bloomberg reported that Turkey, an ally of the United States and Tehran’s third-largest trading partner, may lose one of its important energy supply sources if Washington’s threat to economically isolate the Islamic Republic is carried out.

Last year, Turkey bought 7.7 billion cubic meters of gas from Iran, equivalent to about 13% of its imports, and the Islamic Republic was the fourth-largest supplier of gas to this country. Trade between the two countries also reached about $3.1 billion in the first half of the year.

Bloomberg wrote that the start of the “economic eviction” operation by the United States has placed Ankara between preserving trade and energy relations with Tehran and preventing tensions with Washington. This comes at a time when Turkey is seeking to pave the way for negotiations to buy U.S. F-35 fighter jets.

Nihat Ali Özcan, a strategist at the TEPAV think tank, said that Recep Tayyip Erdoğan, the President of Turkey, will likely avoid an action that could jeopardize his relations with Donald Trump, the President of the United States—even if Ankara has to secure more expensive energy from other sources before winter.