Since the election, Trump has done a number of things that no President or President-elect has done before, flouting numerous norms and conventions. These include his treatment of journalists: tweeting disparagement at journalists and holding a meeting with journalists and media magnates in which he reportedly yelled at them; he seems to be mixing his business interests with his position as President-elect in various ways, including bringing his children (who will be running his business) to meetings with foreign dignitaries; and his appointment of people far far outside the political mainstream to key posts in his administration.