“Biden administration prepares to open overflow facility for migrant children,” CBS.
“Overflow facility” is a distinctly pleasantly sounding term for such an establishment, suggesting links to positively-charged services like swimming pools or libraries. The phrase is a completely new way to refer to prisons; a news search for “overflow facility” pre-January 2021 brings up only stories about COVID overflow clinics or emergency sewage treatment works.
The phrase “concentration camp” to describe the structure was completely absent. Searching for “Biden concentration camp” into news databases is more likely to generate stories about the plight of Uyghurs in Western China rather than domestic affairs.