Count billionaire Ken Griffin as one of those in the business community questioning President Trump's hostility toward the Federal Reserve.

Griffin, the founder and CEO of Citadel and a supporter of the president, criticized Trump's "interventions" in central bank policy in a Wall Street Journal op-ed published Sunday.

"While the U.S. benefits from a large stock of credibility accumulated over decades, it isn’t limitless," Griffin wrote in the op-ed he co-authored with University of Chicago Business School professor Anil Kashyap. "If eroded, markets will demand far higher interest rates for longer-term debt."

Trump has pushed Fed Chair Jerome Powell to lower interest rates for months, often mocking Powell for the Fed's inaction. Powell, whom the president appointed to the job during his first term, has opted against doing so since last September.

That is not the only way Trump has inserted himself into the Fed's affairs.........

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