Forget the election - has Biden had botox?

Karen Bradley, a professor at the University of Maryland who studies politicians' body language, said: 'It's a little strange that nothing moves from his eyes on up.'

'He has clearly had Botox,' Barry Cohen, a plastic surgeon, told the Washington Post.

'The lines are gone on his forehead. There is no way make-up or surgery could do that.'

Erwin Gomez, a spa owner from Georgetown added: 'On the right and the left temple, you can see the lines, but he has no wrinkles in the forehead.'

Mr Gomez said he suspects the senator had a shot of Botox in his brow to disable his scowl muscle, a move that can also bring an unwanted heaviness to the eyelids.