Trump says he will sack a US central bank governor. Why does the independence of the Fed matter?

The struggling budget chain was sold to a private equity firm for £1 earlier this year.

The company's founder gave a wide-ranging interview about its rise and fall.

The central bank governor says the US president "has no authority to do so" in defiance of Trump's escalatory move against the Fed.

President Trump takes aim at Lisa Cook, a central bank official - we unpack what it all means.