As the U.S. wages its global trade war, companies and governments alike are taking notice of a little-known unit of the World Trade Organization that, if President Donald Trump’s administration has its way, will soon cease to function. The WTO’s appellate body, the preeminent forum for settling worldwide trade disputes, may no longer have the capacity to issue new rulings by year-end, which critics warn will undermine the WTO’s ability to resolve conflicts among its 164 members and will usher in