 In 1865, he became coseigneur of the seigneuries of Soulanges and Nouvelle-Longueuil after the death of his father.Saveuse de Beaujeu ran unsuccessfully for a seat in the House of Commons against Jacques Philippe Lantier in 1872 and 1881.He was first elected to the House of Commons in a by-election held in October 1882 after the death of Lantier; his election was declared invalid in December 1883 after an appeal and he was defeated in the by-election that followed.