Biden mistakenly introduces Zelensky as Putin at NATO summit

US President Joe Biden accidentally introduced Ukrainian leader Volodymyr Zelensky as “President Putin” in a gaffe during a signing ceremony on the final day of the Nato summit in Washington DC on Thursday. The blunder will fuel further concerns about his mental acuity after a disastrous debate performance against Donald Trump two weeks ago. It comes just hours before a press conference that could decide the fate of his reelection bid.