President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE on Friday threatened to place a 20 percent tariff on all European cars entering the United States.

Based on the Tariffs and Trade Barriers long placed on the U.S. and it great companies and workers by the European Union, if these Tariffs and Barriers are not soon broken down and removed, we will be placing a 20% Tariff on all of their cars coming into the U.S. Build them here! — Donald J. Trump (@realDonaldTrump) June 22, 2018

The threat, which the president has made before, illustrates the escalating rhetoric in Trump's approach to international trade.

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Trump last week made good on a promise to punish China for its trade practices, announcing he would impose tariffs on $50 billion worth of Chinese goods.





This week, Trump further raised concerns of a trade war by asking his trade representative to evaluate another round of tariffs on $200 billion in Chinese products, a move that followed China's retaliatory measure against the United States.

Commerce Secretary Wilbur Ross Wilbur Louis RossTrump admin asks Supreme Court to fast-track excluding people in U.S. illegally from census Trump 'very happy' to allow TikTok to operate in US if security concerns resolved TikTok, WeChat to be banned Sunday from US app stores MORE told lawmakers on Capitol Hill this week that the administration is just beginning an investigation to determine whether foreign autos and auto parts threaten national security.

Earlier this week, German automakers suggested ending auto tariffs between the U.S. and the EU.

Gary Cohn Gary David CohnGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Former national economic council director: I agree with 50 percent of House Democrats' HEROES Act MORE, Trump’s former top economic adviser, said last week the president had expressed an interest in only having cars in the U.S. that were made here.

“I think he’s going about it in a way where he says, ‘Look I want to grow the economy. Therefore, I don’t want cars made oversees. I want all the cars made in the United States,'” Cohn told The Washington Post.

Cohn said he understands Trump’s rationale, but added that restricting vehicles to ones made in the U.S. is not realistic.

“I’m not going to sit here and say I don’t understand where he’s coming from. He’s saying, ‘Look, I want cars made in the United States. We make great cars in the United States,'” Cohn explained.

“He’s right, we make great cars in the United States. Why would we import a car when if we make more cars in the United States we create more factories, more jobs, more revenue, more taxable income? We broaden the base. It’s kind of simple,” he added.

Many foreign automakers, including BMW and Volkswagen, already build their cars on U.S. shores, and more companies are planning new facilities here.

—Vicki Needham contributed. Updated at 12:20 p.m.