Twitter just sued the federal government over restrictions the government places on how much the company can disclose about surveillance requests it receives. For months, Twitter has tried to negotiate with the government to expand the kind of information that it and other companies are allowed to disclose. But it failed.

Twitter asserts in its suit that preventing the company from telling users how often the government submits national security requests for user data is a violation of the First Amendment. The move goes a step beyond a challenge filed by Google and other companies last year that also sought permission on First Amendment grounds to disclose how often it receives national security requests for data.