This is crazy and obviously has to be stopped somehow. Can't the US Army be sent down there to patrol the upper border of the jungle, so force the migrants to return?
They would just find another route. They’re already contending with cartels, bandits, profiteers, deadly terrain and the Panamanian army. The US army would be the least of the their worries. They’re not doing this journey easy, they’re doing it because they’re desperate and the limited rewards of reaching their goal are worth the great risk.