His problem is that he has to convince people in his own party that he can be a better candidate than Sarkozy, who is president of the party.
It may seem strange to foreigners, but young people in France are very concerned about unemployment.
What's striking is that there's no improvement in terms of optimism in public opinion, instead there's a post-referendum depression. People are worried about jobs and their purchasing power. Unemployment needs to fall for six months in a row for people to take that on board.