Trump's war on the Fed threatens global financial stability, European central bankers warn

President Donald Trump's attacks on the Federal Reserve have "grave" ramifications for the global financial system, a former European Central Bank governor has told CNBC.Jean-Claude Trichet, who is also a former governor of the Bank of France, told CNBC's "Squawk Box Europe" on Wednesday that the Trump administration is "trying to change the game" by upending the long-held consensus of central bank independence that has held in developed economies for almost 50 years.On Sunday, Fed chair Jerome Powell revea ...