Twitter cited freedom of speech as a basis for not turning over records about the account, @ALT_uscis. The account is claimed to be the work of at least one federal immigration employee, according to the lawsuit filed in San Francisco federal court.
The acronym U.S. CIS refers to U.S. Citizenship and Immigration Services, and the account describes itself as “immigration resistance.” Trump has vowed to build a wall along the U.S. border with Mexico and has promised to deport millions of illegal immigrants.