[1] He was a New Democratic member of the Legislative Assembly of Manitoba from 1969 to 1977, and served as a cabinet minister in the government of Edward Schreyer.
The NDP formed a minority government following this election, and Toupin was named Minister of Consumer and Corporate Affairs on July 15, 1969.
Toupin was narrowly re-elected in the 1973 election[1] over Progressive Conservative challenger John Vaags.
Followed a cabinet shuffle on September 22, 1976, he retained the Cooperative Development portfolio and was named Minister of Consumer and Corporate Affairs for a second time, with responsibility for the Manitoba Telephone System and Communications.
[1] The New Democrats were defeated in the 1977 election, and Toupin personally lost his riding to Tory Bob Anderson[1] by just under 2,000 votes.