New York (CNN Business) President Donald Trump is going after the Fed. Again.

In a clip released by Fox Business on Tuesday, the president said in an interview the central bank is his "biggest threat." Trump has been critical of Federal Reserve Chair Jerome Powell, who he appointed last year.

"The Fed is raising rates too fast and it's independent so I don't speak to [him]," Trump told Fox Business journalist Trish Regan.

"I'm not happy with what he's doing," Trump said of Powell. "It's going too fast. Because, you looked at the last inflation numbers, they're very low." The full interview will air on the network on Tuesday night. CNN Business could not immediately reach the Federal Reserve for comment.

.@POTUS to @trish_regan: "The Fed is raising rates too fast."



Watch the full interview TONIGHT at 8p ET on 'Trish Regan Primetime.' pic.twitter.com/kxLsHdtM0b — FOX Business (@FoxBusiness) October 16, 2018

The Fed has been gradually raising rates for three years, finally restoring them to near-normal levels long after the financial crisis. The central bank manages rates to stimulate a weak economy or to keep it from running too hot, which can set off inflation.

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