Republican presidential nominee Donald Trump said Thursday that the president should have some say in interest rates and monetary policy, in his clearest statement yet on the Fed's independence, a move that would go against the central bank's longstanding practice of independence from political actors. "I think, as far as I'm concerned, I've made a lot of money," Mr. Trump said at a news conference at his Mar-a-Lago club in Palm Beach on Thursday. "I've been very successful, and I think, in many...