Treasury Secretary Steven Mnuchin said that the Federal Reserve’s independence is important globally, while refusing to comment on President Donald Trump’s latest attack on the Fed.

Mnuchin was asked about Trump’s tweet Sunday that if the Fed had done its job properly, the stock market would be 5,000 to 10,000 points higher and overall growth would have been “well over” 4% last year instead of 3%.

Mnuchn said, “In my role as secretary, it is inappropriate for me to comment. I do think that the Fed independence is something that the world looks to, and I think that the dollar being the reserve currency is very important.”