Daniel Bermudez’s family had fled Venezuela and was headed to the U.S. to seek asylum when the freight train they were riding through Mexico was stopped by immigration officials.

His wife tried to explain that her family had permission to go to the U.S. Instead, they flew her to Mexico’s southern border as part of a surge of enforcement actions that U.S. officials say have contributed to a sharp drop in illegal border crossings.

In addition to forcing migrants from trains, Mexico also resumed flying and busing them to the southern part of the country and started flying some home to Venezuela.

Even if temporary, the decrease in illegal crossings is welcome news for the White House. President Joe Biden’s administration is locked in talks with Senate negotiators over restricting asylum and $110 billion in aid for Ukraine and Israel hangs in the balance.