Diplomacy Used to Be About Geography. Now It's About Who Agrees With You.

Trump just hosted 12 Latin American leaders in Florida. Brazil wasn't there. Mexico wasn't there. Colombia wasn't there.

That's half the hemisphere's population. More than half its economic output. The three biggest countries in South America.

They weren't excluded because they're far away. They were excluded because they disagree.

Diplomacy by Agreement, Not Proximity

The "Shield of the Americas" summit happened Saturday in Doral, Florida. Argentina's Javier Milei showed up. El Salvador's Nayib Bukele. Paraguay's Santiago Peña. Bolivia, Chile, Ecuador, Honduras, Panama—12 countries total.

Every one of them right-wing. Every one aligned with Trump.

"This is the VIP level of the Latin America Trump Club," Brian Winter, editor-in-chief of Americas Quarterly, told The Guardian.

The White House press secretary called it a gathering "to promote freedom, security and prosperity in our region."

But Brazil's Luiz Inácio Lula da Silva—leftwing president of the largest economy in Latin America—didn't get an invite. Neither did Mexico's Claudia Sheinbaum or Colombia's Gustavo Petro.

All three run leftist or center-left governments. All three were intentionally left out.

The Old Way vs. The New Way

Hemispheric summits used to work differently.

The Summit of the Americas started in 1994 with 34 countries. The idea: every democratic nation in the Western Hemisphere gets a seat. Geography mattered. Neighbors talked to neighbors.

It wasn't perfect. Cuba got excluded. Venezuela sometimes didn't show. But the principle held: if you're in the Americas and you're democratic, you're invited.

Trump's version ditched that. The Rio Grande Guardian put it bluntly: "The Summit of the Americas went from inclusion to exclusion and collapsed this year after Trump decided it is best to deal with leaders that agree with him."

Now you don't get invited because you're nearby. You get invited because you're a fan.

What Changed

Diplomacy used to assume you'd work with whoever governed next door—even if you didn't like them. Geography forced cooperation.

Trade routes crossed borders. Migration didn't stop at ideology. Drug cartels didn't check political alignment.

So you invited everyone and found common ground where you could.

Trump's approach: narrow the table to people who already agree. Security cooperation. Military action against cartels. Joint declarations. The 12 countries that showed up signed onto the "Shield of the Americas" framework—17 nations total when you count those who joined remotely.

But Brazil and Mexico together represent more than half the region's population and economic activity. Colombia's the second-largest country in South America.

Benjamin Gedan, director of the Stimson Center Latin America programme, called the summit's guest list proof of failure: "Brazil and Mexico comprise together more than half of the population in the region [and] more than half of all economic activity. Throw in Colombia and you've got the two biggest South American countries. All [of them] completely on the outside of a US hemispheric policy."

The Split

The Western Hemisphere just got divided. Not by borders. By belief.

If you're a right-wing Latin American leader, you fly to Florida and get face time with the US president. Photo ops. Security cooperation. Investment promises.

If you're left-wing, you wait by the phone.

That's new. And it changes what diplomacy means.

You used to invite your neighbors because they were your neighbors. Now you invite people who agree with you—and call everyone else a threat.

The question isn't whether that's right or wrong. The question is: what happens when the largest economy in the hemisphere only talks to half of it?