U.S. and China roll out tit-for-tat port fees, threatening more turmoil at sea

The U.S. and China on Tuesday began charging additional port fees on ocean shipping firms that move everything from holiday toys to crude oil, making the high seas a key front in the trade war between the world’s two largest economies. A return to an all-out trade war appeared imminent last week, after China announced a major expansion of its rare earths export controls and President Donald Trump