Has Canadian politics become more Americanized since Trump?

[King of Kensington]

It was under Diefenbaker that the Prairies became a Conservative stronghold (the party used to be centered in Ontario and the Maritimes).  Although his politics were different, the Diefenbaker base looks a lot like the Conservative base today.  He combined economic populism with cultural conservatism.

Diefenbaker was described as a "Red Tory" but the definition has shifted to business-friendly social liberals. 

[King of Kensington]

As for the question of the thread, you could see a lot of Obama '08 in Trudeau's 2015 campaign.  The links and parallels between the LPC and the US Democrats seem tighter today.

In contrast, I didn't see much Clinton in the Chretien Liberals (although they worked together in the Third Way governing networks) or Bush in Harper (as much as progressives tried to say he was "exactly like" GW Bush). 

[King of Kensington]

Mulroney a "Red Tory"?

He was often presented as Canada's answer to Thatcher at the time.

Joe Clark was the "Red Tory", Mulroney was the more right-wing Bay Street candidate at the 1983 convention. 

[King of Kensington]

The Conservatives also function as a regional grievance party of the Prairies.

[King of Kensington]

Diefenbaker seems to be quite admired by Conservatives of all stripes, from the very Red Tory Hugh Segal to John Baird and Jason Kenney.

Unlike Stanfield, Clark and Mulroney he was not a "Laurentian consensus" type.

[King of Kensington]

Yes, it was coined by Globe and Mail journalist John Ibbitson.  He claimed that the Conservatives were emerging as the natural governing party as a result of a Western Canada-suburban Ontario alliance.  It didn't really hold up well; not as prescient as Kevin Phillips' The Emerging Republican Majority for US politics in the 1970s and 1980s, for example. 

Now, the Liberals dominate the metropolitan areas of southern Ontario and the Conservatives have been significantly weakened in BC as well.

[King of Kensington]

The difference between the electoral map of 1988 and today is pretty striking:

https://en.wikipedia.org/wiki/1988_Canadian_federal_election

[King of Kensington]

And Scheer is not helping:

https://twitter.com/TorontoPearson/status/1280646263462125568