Why Trump lashed out at Europe over trade

President Trump's surprise tariff threat against the European Union came in the midst of deepening frustration on his economic team over the 27-nation bloc's approach to taxes, regulations and China. Trump's advisers have privately expressed irritation to European officials that EU member nations' differing trade priorities have slowed down the talks, according to people familiar with the discussions. They have complained about what they see as Europe's cautious approach to the negotiations and what they call the EU's reluctance to make concrete offers that address U.S. concerns, such as fees on streaming services, value-added taxes, automotive regulations and fines imposed…