Canadian wildfire smoke is spreading across 20 US states causing air quality alerts from Minnesota to New York. The joke about smoke crossing the border "untaxed" because tariffs don't apply to atmospheric pollution is a play on trade policy — not a claim about actual EPA deregulation. The underlying crisis is real: millions of Americans are being advised to stay indoors due to hazardous smoke. The comment does reference Trump's EPA-related actions, though characterizing those actions requires care. Trump has signed multiple executive orders that direct or affect EPA policy, including orders focused on energy independence and environmental matters. The smoke crisis itself remains a serious air quality problem, separate from the political commentary attached to it.