https://theperfectmathtutorforallseries.com/2026/10/05/an-open-letter-to-president-donald-trump-and-prime-minister-mark-carney-a-prosperous-north-america-for-a-prosperous-world/The Perfect Math Tutor for Allen2026-10-05T18:44:04+00:00An Open Letter to President Donald Trump and Prime Minister Mark Carney: A Prosperous North America for a Prosperous Worldcanada, trump, tariffs, economy, economy, carney, trade