This WSJ editorial says Donald Trump's first foreign policy speech is full of contradictions. Mr. Trump says foreign policy should be "unpredictable" yet this also means says the WSJ, that the country should trust his instincts, and everybody else a loser- "I'm the only one-believe me, I know them all- I'm the only one who knows how to fix it." It says the speech gets an "Incomplete" at Trump University. It criticizes Obama, but in failing to stand up for peace through strength that marked the post war peace since 1945, WSJ says that more than people realize Mr. Trump is a continuation of Mr. Obama's policies of withdrawing from global engagement that has ensured that peace. Trade wars with China, Mexico and Japan could lead to a world recession. Though much needs to be done to ensure trade is fair to U.S. workers and business, Trump has no clearly stated path to do this, instead relying on brinksmanship that could end up in trade wars.