That year, he ran successfully as a candidate of the provincial Ralliement créditiste in the district of Mégantic.
During Dumont's time in the National Assembly, the Ralliement was plagued by internal divisions.
Eventually, the Samson faction re-joined the party and Yvon Dupuis was chosen as leader.
Dumont ran once more for the federal Parliament as an independent in the district of Rivière-du-Loup—Témiscouata in the 1974 election and finished a distant fourth.
During a 1969 debate on liberalizing Canada's abortion laws, he was quoted as saying, "As Christians we cannot accept the theory that life only begins at birth.