"Go into the middle of the caravan, take your cameras and search," Trump told reporters at the White House.
He claimed that they would find MS-13 gang members as well as Middle Eastern citizens trying to enter the United States.
"Guess what? We are not allowing them in our country," he said. "We want safety."
Trump said he was frustrated by Honduras, Guatemala, and El Salvador for failing to stop the caravan from continuing their journey north.
"They have not done their job, unfortunately, they have not done their job," he said. "They’re paid a lot of money every year. We give them foreign aid. And they did nothing for us."
Related: PJ - DHS Warns of Cartel Role in Illegal Alien Caravan