“The Republican party’s shift away from democratic norms is no longer confined to one man, even if he embodies it and accelerates it. It is embedded in the ethos of the party now. Reversing that trend is a daunting prospect because of another shift, one that has been apparent for a while but which is taking especially vivid form in these midterm elections. It is the polarisation of information, so that Americans now exist in two distinct spheres of knowledge, each one barely touching the other.”