Why is the ACLU suing the Trump administration regarding migrants at Guantanamo Bay?

The ACLU-led coalition is suing the Trump administration because they allege the US is holding migrants incommunicado at Guantanamo Bay, denying them any means of communicating with their families and attorneys. This lawsuit directly challenges what they view as unlawful detention practices that violate detainees' rights. The ACLU is specifically demanding access to these detainees so they can provide legal assistance. Their complaint centers on the assertion that these individuals are being completely cut off from outside communication, preventing them from obtaining legal representation or maintaining contact with their families during their detention.