The World Trade Organization “is getting itself on very, very thin ice” by ruling that the US violated trade rules with Trump-era steel and aluminum tariffs, Trade Representative Katherine Tai said, adding that the finding “challenges the integrity of the system.”

The organization “should not get into the business of second-guessing the national-security decisions that are made by sovereign governments,” she said. “It is the responsibility of governments to bring integrity to their decisions on national security.”

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