On Sunday evening I met three left-leaning French friends for a picnic in a Parisian park. We’d hardly begun the pâté before they were arguing. One confessed that she hadn’t voted in the second round of the regional elections. The other two were aghast. Why hadn’t she done her duty as a good socialist? She had voted in the first round but she baulked at supporting a radical left-wing coalition comprising the socialists, the greens, the communists and the far-left France Insoumise.