Trump sends mixed messages to China on trade war

  BIARRITZ, France -- Injecting fresh uncertainty at a time of global economic jitters, President Donald Trump sent mixed messages Sunday on the U.S.-China trade war as leaders at a global summit pushed the unpredictable American president to ease frictions over tariffs and co-operate on other geopolitical challenges. Trump's head-snapping comments at the Group of Seven summit about his escalating trade fight with China -- first expressing regret, then amping up tariff threats -- represente