Yes! US agriculture (Mostly a red state industry) needs potash. Google AI says that most potash comes from (in order) Canada ("is the primary global exporter and supplies nearly 80% of U.S. imports"), Russia, Belarus, China, and "smaller volumes are supplied by countries [...]".
If I were king of Canada, I would restrict supplies of such materials needed by red states.
If I were king of Canada, I would restrict supplies of such materials needed by red states.