PARIS -- French opposition politicians are accusing Nicolas Sarkozy of nepotism after the French president's 23-year-old son Jean said he was a candidate for head of a public agency that runs Paris's financial district, La Défense. The president once held the prominent administrative job.

"We cannot entrust such an important mission to a 23-year-old man whose main credential is his last name," said Christophe Grébert, a member of centrist party MoDem and a municipal councilor in the city of Puteaux, a constituency which is...