President Trump’s latest trade war threat is expected to come into effect this week, but businesses and investors remain unsure about how much it will hurt. internal-storyline-no, International Trade and World Market, United States Politics and Government, Customs (Tariff), Federal Reserve System, Trump, Donald J, Goldman Sachs Group Inc, Standard & Poor’s 500-Stock Index President Trump’s latest trade war threat is expected to come into effect this week, but businesses and investors remain unsure about how much it will hurt. NYT > Business