But that depends on Trump, and there isn't a "prolonged war" if Democrats win in 2028, they would just remove it, and 4 years is nothing, Canada can wait that long. It would only become a problem if a Republican wins and keeps the tariffs.
The US Congress and the American people will not tolerate Trump's antics for the entire four years of his presidency. Events will unfold very quickly. 16 states have already sued Trump over his illegal executive orders, and there are mass protests in 50 states against Trump and his team. If Trump does not smarten up soon and stop committing hostile acts against his neighbors and allies, he will be carried out of the White House. The only difference is whether he is feet first or not.