Manuel Valls is stuck up a cul-de-sac, and his predicament doesn’t date from when he lost to Benoît Hamon in the January socialist primary elections to choose the presidential candidate of the party and its allies. No, the dead end in which he finds himself is with regard to the ambition he has held for much of his career, namely to take hold of the French Socialist Party, and to transform it from its modern foundation, as enacted at the 1971 Epinay Congress, into a party resembling the New Labour of Tony Blair.