Would you want Nigel Farage to marry your daughter?

The opposite of attraction is repulsion. Political commentary gives too little attention to a party’s (or leader’s) capacity to repel. Attractiveness to some may itself inspire disgust in others, simultaneously lifting support yet imposing a ceiling upon how high.

Here’s a quiz. Our last five elections have seen Labour and the Conservatives slugging it out for primacy, each election leaving one of them the loser.