Eric Schneiderman’s office recently took legal or administrative action against “the biggest threat” to New Yorkers: the federal government. By moving to sue the Federal Communications Commission over net neutrality this month, his office took its 100th legal or administrative action against the Trump administration and congressional Republicans. His lawyers have challenged Mr. Trump’s first, second and third travel bans and sued over such diverse matters as a rollback in birth control coverage and a weakening of pollution standards.