US President Joe Biden, under intense scrutiny over his fitness to serve, accidentally introduced Ukrainian President Volodymyr Zelensky as Russian strongman Vladimir Putin at a NATO ceremony before correcting himself.

“Now I want to hand it over to the president of Ukraine, who has as much courage as he has determination. Ladies and gentlemen, President Putin,” Biden said on Wednesday.

Biden quickly corrected himself, saying, “I’m so focused on beating President Putin, we’ve got to worry about it.”