Léger successfully ran as the Parti Québécois candidate in the provincial district of LaFontaine in 1970. He was re-elected in 1973, 1976 and 1981. He became Minister of the Environment in 1976, but was dropped from the Cabinet in 1982.
Léger was leader of the Parti nationaliste du Québec from September 14, 1983 to May 17, 1984. In that capacity, he tried to establish a federal wing for the Parti Québécois and represent Quebec's interests in Ottawa. However PQ Leader René Lévesque conducted a beau risque policy and refused to endorse Léger's attempt.
Retirement from politics
Jean-Paul Beaudry (Union Nationale)
| MNA, District of LaFontaine
Jean-Claude Gobé (Liberal)