Complex sentence: Michel Chartrand never fought in the war but in the 1945 Federal election he was the Bloc Populaire candidate in the Chambly-Rouville riding but lost in a landslide to his Liberal Party of Canada opponent.
Split into simpler sentences: Michel Chartrand never fought in the war, but in the 1945 federal election, he was the Bloc Populaire candidate in the Chambly-Rouville riding. He lost in a landslide to his Liberal Party of Canada opponent.