U.S. President Donald Trump may have the power to order American companies in China to leave the world's second largest economy, but it would cost him politically, said a business leader on Tuesday. "The President could issue orders that would make it very difficult for American companies to continue to do business in China, but I think it's not a legal question of whether he's going to do that — it's a political and economic question," said Timothy Stratford, chairman of the American Chamber of Commerce in China. He was referring to Trump's tweet on Aug. 23 ordering American companies to "immediately start looking for an alternative to China" and urging them to start making their products in the U.S. instead.

The longer the trade negotiations are stalled, the longer that there is unpredictability. Timothy Stratford chairman of the American Chamber of Commerce in China

The president later referred to the International Emergency Economic Powers Act (IEEPA) in a separate tweet, linking it to "Presidential powers" and China. Trump tweet: For all of the Fake News Reporters that don't have a clue as to what the law is relative to Presidential powers, China, etc., try looking at the Emergency Economic Powers Act of 1977. Case closed! Under the act, which was passed in 1977, the president can deal with "any unusual and extraordinary threat ... to the national security, foreign policy, or economy of the United States." However, Stratford said it would be an "extreme step" for the president to exercise that right. "I think that it would be a very radical step for him to take. I think there would be huge pushback across the board in the United States including from leaders of his own political party, and therefore it seems unlikely that he would go that far," he said. "The U.S.-China economic relationship is very, very complicated. It affects a lot of companies and a lot of industries. Just to say 'okay, let's be done with it' is...a very simplistic way to approach it," he told CNBC's "Squawk Box."

President Donald Trump and China's President Xi Jinping shake hands at a press conference following their meeting at the Great Hall of the People in Beijing. Artyom Ivanov | TASS | Getty Images

Even without Trump ordering American firms out of China, companies are already moving out due to the long drawn trade war between the two countries, said Stratford, who is also managing partner at Covington & Burling, a law firm. "The longer the trade negotiations are stalled, the longer that there is unpredictability," he said. In the latest escalation of the trade war, the U.S. on Sunday started imposing 15% tariffs on a variety of Chinese goods while China retaliated with new duties. On Monday, Beijing said it had lodged a complaint against the U.S. at the World Trade Organization over American import duties that affected $300 billion of Chinese exports. The lawsuit is the third that Beijing has brought to challenge Trump's China-specific tariffs at the WTO. The international organization limits the tariffs each country is allowed to charge.

Figuring out Trump's 'real intentions'

One issue in the trade talks is Chinese confusion over the Trump administration's "real intentions," said Stratford. "If you're not confident that you understand the long-term intentions of the other side, then you're concerned about making commitments because you don't know where that's leading," Stratford added.

Trying to figure out what the real U.S. intentions are in this case has been very difficult for the Chinese side. Timothy Stratford chairman of the American Chamber of Commerce in China