After the revolution of 1830 he came to Paris, formed connections with numerous political figures, even with King Louis Philippe, and became a brilliant defender of Liberal ideas in the law courts and in the press. Examples include his "Éloge funèbre" of the bishop Grégoire (1830), his "Mémoire" for the political rehabilitation of Marshal Ney (1833), and his plea for the accused of April 1835. Elected deputy in 1842, he was one of the leaders in the campaign against the Guizot ministry, and his eloquence contributed greatly to the success of his party.