David Hadley Lange was a Canadian

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 provincial politician

Politician

A politician, political leader, or political figure is an individual who is involved in influencing public policy and decision making...

. He was the NDP member of the Legislative Assembly of Saskatchewan

Legislative Assembly of Saskatchewan

The 25th Legislative Assembly of Saskatchewan was in power from 2003 until November 20, 2007. It was controlled by the Saskatchewan New Democratic Party under premier Lorne Calvert.-Members:-By-elections:...

 for the constituency of Assiniboia-Bengough

Assiniboia-Bengough

Assiniboia-Bengough was a provincial electoral district for the Legislative Assembly of Saskatchewan, Canada. This constituency was created from the riding of Benough and parts of other ridings before the 1971 Saskatchewan general election...

, from 1971 until 1975 and for the constituency of Bengough-Milestone

Bengough-Milestone

Bengough-Milestone was a provincial electoral district for the Legislative Assembly of Saskatchewan, Canada. This constituency was created before the 1975 Saskatchewan general election...

 from 1975 until 1978. He was the first and only representative of Assiniboia-Bengough, as it was replaced before the next election

Saskatchewan general election, 1975

The Saskatchewan general election of 1975 was the eighteenth provincial election held in the Canadian province of Saskatchewan. It was held on June 11, 1975, to elect members of the Legislative Assembly of Saskatchewan...

 by the ridings of Bengough-Milestone and Assiniboia-Gravelbourg

Assiniboia-Gravelbourg

Assiniboia-Gravelbourg was a provincial electoral district for the Legislative Assembly of Saskatchewan, Canada. This constituency was created from the ridings of Gravelbourg and Assiniboia-Bengough before the 1975 Saskatchewan general election...

. Following the dissolution of the Assiniboia-Bengough riding, he was elected as representative for the newly created constituency of Bengough-Milestone. He did not run in the 1978 election

Saskatchewan general election, 1978

The Saskatchewan general election of 1978 was the nineteenth provincial election in the Canadian province of Saskatchewan. It was held on October 18, 1978, to elect members of the Legislative Assembly of Saskatchewan....

 and was replaced as representative of Bengough-Milestone by Progressive Conservative

Progressive Conservative Party of Saskatchewan

The Progressive Conservative Party of Saskatchewan is a right-of-centre political party in the Canadian province of Saskatchewan. Prior to 1942, it was known as the Conservative Party of Saskatchewan. Members are commonly known as Tories....

 Robert Hugh Pickering.