A caravan of up to 7,000 Central American migrants has been working its way from Honduras through Guatemala and Mexico with the aim of entering the United States. This, the second big caravan this year, has generated widespread news headlines and Twitter-based threats from US President Donald Trump to cut off aid to Central America’s ‘northern triangle’ countries (El Salvador, Guatemala, and Honduras). There is reason to believe this particular caravan may have major knock-on effects, not least on the US mid-term Congressional elections, on relations between the US and the incoming administration of Andrés Manuel López Obrador (AMLO), and on the Central American economies.