Sarko vs Juppé: will the French right select a candidate who can stop Le Pen?

On 20 and 27 November, the French right will select its candidate for the 2017 presidential election. While formally a seven candidate race, polls indicate that the real battle is between former president Nicolas Sarkozy and former prime minister and mayor of Bordeaux Alain Juppé. Marta Lorimer discusses the polls and the variables likely to shape the final result.