He ran as an Action libérale nationale candidate in the district of Frontenac in the 1935 provincial election and won.

Tardif joined Maurice Duplessis's Union Nationale and was re-elected in 1936, but was defeated by Liberal candidate Henri-Louis Gagnon in 1939.

He was appointed to the Legislative Council of Quebec in 1952 and represented the division of De la Vallière until the institution was abolished in 1968.

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