DeSantis bashes Trump as 2024 campaign swing begins
https://www.reuters.com/world/us/desantis-mount-first-campaign-swing-through-key-2024-states-2023-05-30/
It's been a long time since I read through the history of it in the courts and US regulatory system, but it was sort of the unintended consequence of a collision of individually well-meaning left-leaning positions.
Something like:
(allow detainees to stay to argue for asylum instead of shipping them out immediately) + (make sure children are held in age-appropriate settings) = (separate children while they're being allowed to stay in detention)