In 1827, the marquis was named chairman of the electoral college in Morbihan and in 1827 was elected to the French Chamber of deputies for Cher, holding the seat almost uninterrupted until 1846. He took no part in politics after 1848 and became a zealous philanthropist and a partisan of constitutional monarchy. The marquis wrote on social questions, notably on prison administration; he edited the works of La Rochefoucauld, and the memoirs of Condorcet; and he was the author of some vaudevilles, tragedies and poems.