Premise: The current Prime Minister Stephen Harper supported Mulroney's right to comment on Trudeau, "I think it's well known Mr. Mulroney was an opponent of Mr. Trudeau," Harper said. "He was his opposition leader and, as you know, came to power at the end of the Trudeau period when people wanted to make a change. I'll leave it to people who were there then to fight those battles. I think it's perfectly reasonable that they would comment. I think these are debates that are best left to some of the people who were around then and academics." Trudeau's former piers and friends have rallied behind his legacy and made public comments to dampen Mulroney's accusations.
Hypothesis: Mulroney and Trudeau are political allies.