PARIS—Europe’s fragmenting political landscape is an opportunity for Emmanuel Macron to blow apart Brussels’ traditional left-right duopoly in next year’s European election, the newly appointed head of the French president’s EU campaign said.
In his first interview since his appointment as top strategist in Macron’s En Marche party, Stéphane Séjourné says the campaign will “shake up the system,” tapping into growing disaffection among the mainstream left and right.