 He was elected to the Académie française in 1934.He was the Ambassador from Vichy France to the Holy See from 1940 to 1945.During his time as Senator, he was called upon by Édouard Daladier in early February 1939 to travel to Burgos, then under control of the Spanish Nationalists during the Spanish Civil War, which was drawing to its conclusion and Nationalist victory, to secure a treaty with Francoist Spain.