Trump threatened to add tariffs to Canada's existing trade burden, saying the country is responsible for pollution costs from wildfires burning in Ontario whose smoke is drifting into the US. The smoke is real—tens of millions of Americans are experiencing degraded air quality across the Midwest and Northeast—but Trump blamed Canada for "willful negligence" in forest management rather than acknowledging the broader climate and fire conditions both countries face. What's missing: context that Canadian PM Mark Carney has stated both countries share responsibility for addressing climate change, which experts identify as a major driver of worsening wildfire seasons.