Columbus — US companies are concerned about President Donald Trump’s threats to ban them from doing business in China, and are poised to halt new investments if the trade war escalates, the leader of group of top chief executive officers said on Sunday.

US company executives get worried when they hear talk from Trump about invoking emergency powers on trade, said Josh Bolten, president and CEO of the Business Roundtable and a former chief of staff to former president George Bush.

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