The lawsuit says there is no legitimate reason to send migrants to Guantánamo because the U.S. has ample detention facility.

The individuals at risk of detention at Guantanamo Bay include seven Venezuelan nationals, one Afghan national, one Pakistani ...

The plaintiffs are seeking a court order to halt further transfers to Guantánamo and to return any detainees currently held ...

and ACLU of the District of Columbia -- argue that it is illegal for the U.S. to first send those migrants to Guantánamo. The suit maintains that there is no legitimate reason to do that because ...