President Donald Trump’s campaign lawyers at Jones Day pushed back Thursday against a nonprofit group’s pursuit of documents related to the 2016 hack of the Democratic National Committee, assailing the request as a “last-ditch effort to launch a fishing expedition into the president’s and the campaign’s files.”

The new court filing by the Trump campaign’s outside legal team came in response to a lawsuit alleging that the Trump campaign and one of its high-profile informal advisers, Roger Stone, conspired with Russia and WikiLeaks to publicly release emails stolen from Democratic National Committee servers in the District of Columbia.