Corbyn and McDonnell repeatedly shot down the Alliance idea. No deals with those terrible reactionaries and their, erm, social democratic liberalism. Or indeed, in the case of the Green Party, eco-socialism-possibly-a-bit-more-authentically-left-than-Labour-don’t-tell-anyone. Next time around, of course, they’ll refuse again, even more confident now that voters will be more flexible and politically adroit than they’re prepared to be, and save them the ideological embarrassment of compromise. The lesson of May’s stunning failure, which politicians across the board are desperate not to learn, is that support in this increasingly reflexive political environment is not owned but lent.