As the United States has struggled to build support among its traditional allies in Europe to combat what it calls Iran's aggression, it has been forced to look elsewhere, such as Latin America, for support.
This week, the Argentine government plans to designate the militant group Hezbollah as a terrorist organization, giving the Trump administration another ally in its push to build an international coalition to confront Iran. Hezbollah, which is based in Lebanon, is supported by Iran.