In a move that will surely make trade negotiations as cozy as a Canadian winter, Canada announced retaliatory tariffs on hundreds of U.S. goods on Tuesday, deepening the ongoing trade tiff between the two neighbors.

Canadian Finance Minister François-Philippe Champagne declared the countermeasures will match U.S. tariffs "dollar for dollar, rate for rate," with tariffs of 15%, 25%, and 50% on a range of U.S. exports, effective Sept. 8. The targets: steel, dairy, appliances, agricultural equipment, pulp and paper, and electronics - totaling nearly $20 billion worth of U.S. annual imports. Because nothing says "fair trade" like a tariff on Canadian bacon... wait, that's not on the list, but you get the idea.

The move comes after President Trump slapped 50% tariffs on many Canadian goods and threatened more after trade talks broke down on Friday. Champagne said, "When the United States asked too much and offered too little, we chose to stand up for Canadians." He added, "Canada's countertariffs are designed primarily to provide protection for Canadian industry impacted by U.S. tariffs and allow them to compete against U.S. products in the Canadian market. It's all about fairness. It's all about level playing field. It's all about supporting Canadian workers and Canadian businesses." Because who doesn't love a level playing field, especially when it's covered in maple syrup?

Leading up to Canada's announcement, President Trump took to social media to vent his frustrations, accusing Canada of "ripping off" the U.S. for decades, insulting Prime Minister Mark Carney by calling him "Governor Carney," and floating the idea of renaming Lake Ontario to "Lake America." Because nothing says diplomacy like geographic rebranding. Trump has also repeatedly suggested Canada should become a U.S. state - presumably so he could add "51-star flag designer" to his resume.

Carney, for his part, suspended trade talks with the U.S. on Friday, saying last-minute changes to the U.S. proposal were "unfair, uneconomic and called into question the reliability of any deal." At a news conference the next day, he likened the U.S. actions to a conflict: "You're at war when you get attacked. We got attacked." So, trade war it is, with tariffs as the ammunition.

This is a developing story that may be updated, because apparently, in trade, the only constant is change - and the occasional tariff.