In 1983, he unsuccessfully ran for the leadership of the Progressive Conservative Party of Manitoba.

The Progressive Party of Manitoba led by John Bracken formed the government.

In 1928, the Progressive Party of Manitoba decided to withdraw from politics and concentrate on being a service and lobbying organization.

Prefontaine was by this time a member of the Progressive Party of Manitoba.

He was also provincial secretary of the Progressive Conservative Party of Manitoba during this period.

In 1983, he was an unsuccessful candidate for the leadership of the Progressive Conservative Party of Manitoba.

The Progressive Conservative Party of Manitoba won a majority government in the 1990 provincial election.

He supported the Progressive Conservative Party of Manitoba in this period.

One year later, he campaigned for the Progressive Conservative Party of Manitoba in the 2003 provincial election.

After the election, the United Farmers governed as the "Progressive Party of Manitoba".