If you think tariffs are painful, try watching President Donald Trump’s aides and supporters attempt to defend them. Whenever they come up with a rationale for his policies, however dubious, he immediately says or does something to contradict it. They say Trump’s trade strategy is all about containing China — then he slaps tariffs on the allies we would need to do so. They explain that the law lets him impose tariffs on Canada to protect our national security, only for him to let slip that he’s mad about Canadian dairy policies.