Ronald Reagan’s presidency of the 1980s is known as the ‘Reagan Revolution’, while Franklin D Roosevelt - the only president who has served for more than two terms -  is known for his reformist agenda.

So, now that it’s officially a year on from Donald Trump’s inauguration, for a second time, how does the scale of what he has upended and changed compare?

Today North American correspondent Michael Koziol on the deliberate chaos of the Trump presidency, and whether he is likely to toss aside legalities and run for a third term.