The U.S. and China this week extended to Dec. 31 the deadline for China to bring its agricultural tariff-rate quotas into World Trade Organization compliance after a successful U.S. challenge. This marks the fifth extension request from the two countries, pushing China’s required compliance timeline back a year in total. The previous deadline was Nov. 9. According to a WTO communication made public on Tuesday, the two countries agreed to extend the timeline for compliance to “allow the United States...