Donald Trump had joined Twitter in 2009, prior to his presidency. Many Twitter employees had expressed concern to the company's management about hosting Trump prior to and at the start of his presidency. Trump continued to use his personal account "@realDonaldTrump", rather than the official presidential account "@POTUS" that Twitter had arranged previously. Twitter employees remained highly skeptical of Trump's use of Twitter, particularly after the shooter in the 2019 El Paso shooting had written a manifesto that recited many of Trump's prior tweets; employees considered Trump was using Twitter as a "dog whistle". Twitter opted to eliminate all political advertising in wake of this.