Tariffs and Tennis Racquets; The Irish back stop is like King Canute facing down global trade.

The European Union wisely chose near frictionless trade internally, the Single Market, but high barriers to global goods coming in, the Customs Union. Some argue that the United States grew its economy behind a similar barrier of tariffs in the 19th century. Indeed, most developed economies use tariffs and quotas to protect their domestic industries. […]