For a moment on Sunday, the government of Colombia’s Gustavo Petro looked like it might be the first in Latin America to take a meaningful stand against President Donald Trump’s mass-deportation plans.

Donald Trump’s belligerence toward Latin American leaders raises the prospect of a more concerted regional resistance, one its popular left bloc is well positioned to lead.

A simmering diplomatic stand-off over deportation flights spilled onto social media Sunday, threatening the once close relationship between the US and Colombia and further exposing the anxiety many feel in Latin America towards a second Trump presidency.