He opened a law practice in La Tuque in the Mauricie area.
Ducharme ran as a Conservative candidate in the district of Portneuf in the 1921 and 1925 federal elections, but each time lost to Liberal Party of Canada incumbent Michel-Siméon Delisle.
He ran as an Action libérale nationale candidate in the district of Laviolette in the 1935 provincial election and defeated Liberal Party of Quebec incumbent Joseph-Alphida Crête.
He served as Parliamentary Assistant to the Minister of Municipal Affairs from 1956 to 1960.
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