Question: The 17th Premier of Nova Scotia and leader of the federal Progressive Conservative Party of Canada Robert Stanfield fought a few times and lost in general elections against which politician who is currently one of the longest-serving Prime Minister in Canadian history?
Sentence (from "Robert Stanfield"): He was the leader of the "Her Majesty's Loyal Opposition" and fought three general elections, losing each time to the Liberals under Pierre Trudeau.
Relevant evidence: Yes