Hecho en Mexico While outgoing Mexican president and populist AMLO tries to shutdown American farmers, the U.S. government just keeps giving to Mexico. The de minimis duty is about to go away. The personal free import allowance is complex. Most American citizens reentering the country think of booze and perfume. But current allowances are high enough, and the tracking of billions of transactions so complex, that the Amazon loophole is a meaningful transaction incentive for Chinese suppliers.  Making American purchases of goods from China pay full duty rates is death by a thousand little cuts. Mexico again is the main beneficiary of this U.S. policy shift against China. When a U.S. official finally gets the cojónes, the message...