BIARRITZ, France — President Trump asserted on Saturday that he has the authority to make good on his threat to force all American businesses to leave China, citing a national security law that has been used mainly to target terrorists, drug traffickers and pariah states like Iran, Syria and North Korea.
As he arrived in France for the annual meeting of the Group of 7 powers, Mr. Trump posted a message on Twitter citing the International Emergency Economic Powers Act of 1977, a law originally meant to enable a president to isolate criminal regimes, not sever economic ties with a major trading partner over a tariff dispute.
“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,” Mr. Trump wrote. “Case closed!”