It was controlled by a Liberal Party minority under Prime Minister Lester B. Pearson and the 19th Canadian Ministry.

Pierre Trudeau succeeded Pearson as party leader and Prime Minister shortly before this Parliament ended for the 1968 national election.

The Official Opposition was the Progressive Conservative Party, led first by John Diefenbaker, and subsequently by Michael Starr.

He resigned his provincial office in September 1967 to contest the federal seat of Bonavista—Twillingate vacated by Jack Pickersgill.

Granger was successful and became Minister without portfolio in Pearson's Cabinet.