Why isn't he running for French president (if that's your question)? I think he really believes in, and is well adapted to, the European sphere of politics. I heard him say on Sunday evening he wasn't French, though I thought he had dual nationality: wikipedia says:
Daniel Cohn-Bendit - Wikipedia, the free encyclopedia
Being officially stateless at birth, when he reached the age of 18 he was entitled to German and French citizenship, but he renounced the latter in order to avoid conscription.
That would be an obstacle.
But it's true Cohn-Bendit was expelled from France in 1968, which would not have been possible had he held French nationality.
French Wikipédia says:
Daniel Cohn-Bendit - Wikipédia
il naît en France de parents juifs allemands réfugiés en France en 1933 pour fuir le nazisme. Daniel Cohn-Bendit est apatride jusqu'à l'âge de 14 ans, où il opte pour la nationalité allemande[3] pour, dit-il, ne pas être soumis au service militaire en France. Il se définit toutefois comme « citoyen européen ».
He was "stateless till the age of 14, when he chose German nationality to, he says, not have to accept military service in France". There's a reference to a Télélibre.fr interview where he says this.
