New York Mayor Zohran Mamdani, right, passes former New York Mayor Rudy Giuliani ahead of a ceremony commemorating the 25th anniversary of the Sept. 11, 2001, attacks at the National September 11 Memorial in New York City on Friday, Sept. 11, 2026. (Barry Williams /The Daily News via AP, Pool)

Canadian Prime Minister Mark Carney, right, and Ukraine's President Volodymyr Zelenskyy, speak after signing agreements in Calgary, Alberta, Canada, Thursday, Sept. 10, 2026. (Jeff McIntosh/The Canadian Press via AP)

Canadian Prime Minister Mark Carney, right, and Ukraine's President Volodymyr Zelenskyy, speak after signing agreements in Calgary, Alberta, Canada, Thursday, Sept. 10, 2026. (Jeff McIntosh/The Canadian Press via AP)

Canadian Prime Minister Mark Carney speaks to the media at a cabinet retreat in Banff, Alberta, Thursday, Sept. 10, 2026. (Jeff McIntosh/The Canadian Press via AP)

Ukrainian President Volodymyr Zelenskyy's plane arrives in Calgary, Alberta, Wednesday, Sept. 9, 2026. (Jeff McIntosh/The Canadian Press via AP)

President of Ukraine Volodymyr Zelenskyy and his wife Olena Zelenska arrive in Calgary, Alberta, on Wednesday, Sept. 9, 2026. (Jeff McIntosh/The Canadian Press via AP)

President of Ukraine Volodymyr Zelenskyy and his wife Olena Zelenska arrive in Calgary, Alberta, on Wednesday, Sept. 9, 2026. (Jeff McIntosh/The Canadian Press via AP)

Ukraine President Volodymyr Zelenskyy, left, and Canadian Prime Minister Mark Carney meet in Calgary, Alta., Thursday, Sept. 10, 2026. (Jeff McIntosh/The Canadian Press via AP)