President Donald Trump late Thursday threatened a 35% tariff on goods imported from Canada, a dramatic escalation in an on-again, off-again trade war with America’s northern neighbor and one of its most important trading partners.

Tariffs have become central to Trump's foreign policy playbook. But in Brazil tariff threat, is he conflating his own personal interests with those of the United States?

It’s almost as if tariffs are the new sanctions. Consider Trump’s announcement Wednesday that Brazil will face 50 percent tariffs. He made that threat in part because he’s upset about how the current Brazilian government is treating former Brazilian President JAIR BOLSONARO,