"We no longer want to do any kind of business with Spain. I would like that to stop. Spain is a terrible partner in NATO. They don’t take part, they don’t pay. I don’t want anything to do with Spain. Cut all trade with Spain, please, including visits," Donald Trump declared at a joint press conference after the NATO meeting in Ankara on Wednesday. ADVERTISEMENT ADVERTISEMENT The US president’s remarks stand in stark contrast with how the European Union’s trade policy works. Since the creation of the single market in 1993, tariffs, trade agreements and other measures in this field…