In May 2016, the chief of staff of the European Commission president caused quite a stir with a goading tweet: “#G7 2017 with Trump, Le Pen, Boris Johnson, Beppe Grillo? A horror scenario that shows well why it is worth fighting populism”. The tweet came from Martin Selmayr, a former spokesperson for the European Union government who has now become the ever-present right-hand man of the former prime minister of Luxembourg.

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