300,000 unaccompanied migrant children missing claim disputed by experts, citing documentation and communication issues, not children being lost.

Republicans, including Donald Trump, claim that over 300,000 unaccompanied migrant children crossing the U.S.-Mexico border are missing, criticizing Biden's border policies. However, experts highlight that these claims lack context. A DHS report indicates that over 291,000 children had not received court notices, but this reflects issues with documentation and communication, not that the children are "lost." Many factors may explain their absence from hearings, including agency miscommunication.