Senile senior? Devastating verdict for Biden. Even in his own party, some question whether Biden is the right choice for one of the toughest jobs in the world at his age.

Biden recently confused French President Emmanuel Macron with one of his predecessors, François Mitterrand. He also confused German Chancellor Angela Merkel with the late former head of government Helmut Kohl. The Democrat wants to run again in the presidential election in November, and his age is already the biggest problem in his re-election campaign.