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

Immigrant rights groups sued the Trump administration on Saturday in hopes of stopping the transfer of migrants from the U.S.

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 ...