It's become a common refrain: the shambolic US administration of Donald Trump encounters, in an average week, a scandal that would end a normal presidency.

Early this month, The Washington Post described "the misconduct revealed during just one day this week" as "worse than what presidents normally experience during an entire term". Meanwhile, the ABC wondered early last year, "how many controversies can Trump survive?"(correctly concluding it would be quite a few). 

Such was the lack of faith in Trump's integrity that talk of his impeachment even predated his first day in office -- but is he uniquely scandal prone? We delved into the history books, revisiting the key scandals of the last three presidents to examine whether Trump's disasters would have sunk his predecessors.