Wine may be losing its place on the fringes of trade policy controversy. Having previously been limited to a spat regarding shelf positioning between the U.S. and Canada it may be drawn into China’s relations with the U.S. and Australia. Wine, along with beef, are two major import lines from Australia (worth $2.9 billion and $3.3 billion respectively in Chinese imports) that may be diverted to U.S. exporters as part of thawing America-China trade relations. Chinese imports surged 23% higher in the past 12 months on a year earlier as the earlier anti-extravagance policy faded. American...