WASHINGTON (Reuters) -U.S. President Donald Trump said on Friday he may have to change his mind about firing Federal Reserve Chairman Jerome Powell.

Trump made the comment in a lengthy social media post criticizing the Federal Reserve's decision to not lower interest rates.

"I don't know why the Board doesn't override (Powell)," Trump wrote.

"Maybe, just maybe, I'll have to change my mind about firing him? But regardless, his Term ends shortly," Trump added.

"I fully understand that my strong criticism of him makes it more difficult for him to do what he should be doing, lowering Rates, but I've tried it all different ways," Trump said.