It looks like President Trump can chalk up another win for his unique brand of tariff diplomacy now that Mexico is yielding to America’s demands on improving border security and halting the flow of fentanyl. Mexico’s complaisance appears, for now, to stave off the prospect of a threatened 25 percent tariff on imports from our neighbor to the south. Plus also too, Canada, in a separate deal, will get at least a month of reprieve.