For Donald Trump it was almost routine: he already knew the procedure for being sworn in as President of the United States of America from 2017, and now at lunchtime on Monday he became the second and – according to the constitution – the last time as US President sworn. It was even the fourth “inauguration” for his predecessor: he experienced it twice, in 2009 and 2013, as Barack Obama’s deputy, in 2017 he attended it as outgoing vice president – and in 2021 he finally became the 46th US President himself sworn. At the time, it was a swearing-in ceremony in which his predecessor – Donald Trump – did not take part: he had never and has never acknowledged Biden’s victory, and therefore did not want to personally hand over the baton to him.