This is happening because Central Americans know they will have a better chance of avoiding deportation, at least temporarily, if they are processed along with children.

The economics of the journey reinforces the decision to bring a child: Smugglers in Central America charge less than half the price if a minor is part of the cargo because less work is required of them.

Unlike single adult migrants, who would need to be guided on a dangerous march through the deserts of Texas or Arizona, smugglers deliver families only to the U.S. border crossing and the waiting arms of U.S. immigration authorities. The smuggler does not have to enter the United States and risk arrest.

The Trump administration tried to deter parents this spring when it imposed a “zero tolerance” family-separation policy at the border. But the controversy it generated and the president’s decision to halt the practice six weeks later cemented the widely held impression that parents who bring children can avoid deportation.