Trump’s announcement has not yet turned into formal policy and reportedly surprised Brazil’s president. Just as Trump’s invocation of national security to justify earlier tariffs was bogus, his latest claim also appears contrary to the facts. According to Axios’ coverage of the announcement, both countries’ currencies “are freely traded and have been for years” and “have weakened because of political upheavals and dwindling growth forecasts in the two countries — not government intervention.” The Washington Post’s article on Trump’s announcement pointed to the latest biannual Treasury Department report on currency manipulation that “did not allege Brazil or Argentina had done anything improper in handling their currencies.”

Yet tweets from four broadcast and cable news networks passed on Trump’s lie justifying his action, continuing a pattern of major news outlets repeating Trump’s misinformation to their audiences: