'Tariffs all the way': Trump says European Union must buy U.S. oil and gas in trade ultimatum

U.S. President-elect Donald Trump on Friday told the European Union it must reduce its trade gap with the U.S. through oil and gas purchases or face tariffs.

"I told the European Union that they must make up their tremendous deficit with the United States by the large scale purchase of our oil and gas. Otherwise, it is TARIFFS all the way," Trump posted on his Truth Social platform shortly after 1 a.m. ET.

According to U.S. figures, the country's goods and services trade deficit with the European Union was $131.3 billion in 2022.

Trump made threats of sweeping tariffs on U.S. trading partners including China, Mexico and Canada a signature part of his presidential campaign — and he's continued the narrative as he prepares to enter office, despite economists warning of risks to domestic inflation.

Analysts say there is high uncertainty over the extent of the tariffs Trump will be willing — or able — to follow through with, and how much of his rhetoric is a starting point for striking deals.

Enrico Letta, former prime minister of Italy and dean of the IE School of Politics, Economics and Global Affairs, told CNBC's "Squawk Box Europe" on Friday that the EU needed to be prepared to retaliate to Trump's threat.

"I think it is a transactional approach, we have to respond to this transactional approach. [Trump] mixes together energy and tariffs on goods, manufacturing and so on. I think it's incorrect because the two topics are completely different," Letta said.

"If the deal is proposed by Trump — such an asymmetric deal on topics that are not linked one to the other — I think we have to do the same."

"Considering that the most asymmetric part is the relationship on the financial side, we have to start considering that maybe replying on the financial side could be a solution," he added.

The U.S. was the biggest recipient of EU goods in 2023, accounting for 19.7% of its exports.

CNBC has contacted the European Commission for comment.

This breaking news story will be updated shortly.