This article is in The Spectator’s inaugural US edition. Subscribe here to get yours.

‘He ran twice for president and lost when he didn’t have dementia,’ a veteran Democratic party operative remarked to me earlier in the year apropos Joe Biden. ‘So why should we think he’d win now he does have dementia?’ It was a fair question, to which the answer could be: (a) maybe he does have dementia, but so what? Ronald Reagan had dementia for at least part of his presidency (how early this manifested is open to argument — first or second term?) and they name airports and ugly buildings...