In all the explanations of voter behavior that have been floated over the past few months, the one that I can’t quite get out of my mind is a recent comment from Tony Travers, a professor of government at the London School of Economics, who told The New York Times that “people are switching loyalties, not tribally, but like consumers.”
He was talking about the British election last month and the defection of so many presumed Conservative voters to the rumpled promise of Jeremy Corbyn, but he could just as easily have been talking about the French election and rise of

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