Last week, the finance ministers of Europe's five biggest economies — Germany, France, the UK, Spain and Italy — wrote an anxious letter to their American colleague, US Treasury Secretary Stephen Mnuchin, and copied it to all senior Republican politicians in the Congress and Senate. The letter's thrust: The draft US tax bill, if passed as written a week ago, would represent a break with global fair-taxation rules as applied to corporations, and represent a thinly disguised form of trade war. "The United States is Europe's single most important trade and investment partner," the finance ministers wrote. "It is important...
