COMMENT | There is an easy way to beat United States President Donald Trump’s divide-and-conquer approach to tariffs, which forces nations to buckle to unreasonable import duties and restrictions, openly defying international rules and norms.

That is to simply take a unified, common approach to tariffs. If just the European Union (EU), Brics (Brazil, Russia, India, China, South Africa), and Asean take the lead to force Trump into true negotiations, things will change.

Trump cannot fight it without considerably damaging US interests. Other nations not part of these three groups can be welcomed into this unity circle to take a joint stand on the tariffs, especially partners under other trade arrangements.

To provide greater international legitimacy, the group can...