It shows that personal grudges rather than simple economics are a driving force in the U.S. leader’s use of tariffs.

The pause on the biggest of Trump's tariffs won't end this week, but the president continues to pledge steep new duties against major countries.

Brazilian President Luiz Inácio Lula da Silva has said he is ready to match any tariffs imposed on Brazil by the United States. Lula was responding to Wednesday's threat by his US counterpart, Donald Trump,