The letter about Cook’s mortgages further ratchets up the administration’s sustained pressure on the Federal Reserve to lower interest rates.

US President Donald Trump has said a top official at the Federal Reserve "must resign, now!!!" over unproven allegations of mortgage fraud, as he continues to seek more influence over the US central b...

While the Fed is designed to operate independently of the White House in setting interest rates, Trump has been outspoken in insisting that borrowing costs should be lower.