After months of criticizing Federal Reserve Chair Jerome Powell, President Donald Trump took the fight to the Fed’s front door on Thursday, publicly scorning the central bank chief over the ballooning costs of a long-planned building project.

The president toured the Federal Reserve’s headquarters with its chair, as the administration intensifies its campaign against his handling of the economy and the multibillion-dollar project.

Speaking to reporters at the start of his tour, Trump said that the administration was "taking a look at what's happening" at the Fed's $2.7bn (£1.8bn) renovation. "It looks like it's about $3.1bn," Trump said, as Powell shook his head.