OTTAWA — Not only has U.S. President Donald Trump upended Canada’s trade relationship with its closest neighbour, but also the affordability fight Conservative Leader Pierre Poilievre wants to have in the next election.

Soaring Conservative confidence has now been tempered by the departure of Justin Trudeau and the upheaval south of the border, two events that have collapsed Poilievre’s 20-point lead in the polls, with some surveys now suggesting he is trailing Prime Minister Mark Carney.