Have the lunatics taken over the asylum?

The Donald Trump phenomenon could never happen here, could it? Crackpots and conspiracy theorists formerly on the political margins could never seize the centre-ground, could they? Perhaps, suggests the Guardian's Rafael Behr, they already have, "in an understated, low-key, parochial and idiosyncratically British kind of way" - and regardless of the fact that "we tell ourselves that we are smarter, more civilised, less credulous and worldlier than our American cousins".

(Thanks to Adam for the link.)