Mostly Hollande, Valls, Le Drian and the "social-liberal" crowd, who antagonized the left electorate by steering the government to a neolib course, away from the platform they campaigned for in 2012.

What really precipitated the crisis was the voters decision to nominate a candidate with a real left wing program - Hamon - instead of the anointed Valls during last January's primaries. This gave the third-wayers the excuse to jump ship and openly support Macron, effectively sinking their own party.