https://www.reuters.com/article/us-twitter-trump/twitters-fact-check-label-prompts-trump-threat-to-shut-down-social-media-companies-idUSKBN2331NK

U.S. President Donald Trump on Wednesday threatened to regulate or shut down social media companies for stifling conservative voices, a day after Twitter attached a warning to some of his tweets prompting readers to fact check the president's claims.