Why banning 'harmful' online speech is a slippery slope Today's best articles Daily business briefing Solving COVID newsletter The mob attack on Capitol Hill on January 6, instigated by President Trump in the hope of thwarting or at least delaying the certification of President-elect Joe Biden's election victory, was unquestionably one of the most shameful episodes in the political history of the United States. Ironically, the failed insurrection may well be the beginning of the end of Trumpism. But the fallout from these tragic events could also include a far less welcome development: a rush to regulate, quash, and banish a wide range of expression regarded as potentially dangerous.