In 1966, he was the President of the Union Nationale's electoral campaign and was the Chief of Staff to Premier Daniel Johnson and Deputy Minister of Executive Council from 1966 to 1968.
In 1968, he was the General Director of the Union Nationale.
He was elected in a March 1969 by-election in the riding of Dorion and was appointed Minister of Immigration in Jean-Jacques Bertrand's cabinet, in which he served until 1970.
From 1969 to 1970, he was the Minister of Finance.
He was defeated in the 1970 election.
He ran unsuccessfully in 1971 for the leadership of the Union Nationale, placing third, behind victor Gabriel Loubier and Marcel Masse.