The National Post reports in its Thursday edition that the deregulatory and tax-cutting parts of Donald Trump's agenda remain as popular as ever on Wall Street, but it is hard to find anyone who likes tariffs. The Post's Tristin Hopper writes that it is one thing to impose a tariff on an import that can be readily replaced by a U.S.-made alternative, such as beer, beef or potato chips, but the bluntness of the U.S. President's tariffs has revealed a whole bunch of Canadian imports that do not have easy replacements. As such, Americans are simply being forced to eat the 25-per-cent tariff and pass it along to their customers in the form of higher prices. The inflexible nature of U.S. aluminum demand, for instance, means that Americans are still buying roughly the same quantities of Canadian aluminum, except now at a 10-per-cent premium. U.S. farmers are similarly so dependent on Saskatchewan potash that they have been begging the White House for a tariff exemption. The U.S. is only able to produce about 10 per cent of its domestic potash needs, with the rest coming from Canada. "No substitutes exist for potash as an essential plant nutrient," reads a statement last month by the American Fertilizer Institute.