It might have escaped your notice, but there’s this vote thing going on in America at the moment. If you have, it is to decide which person is best suited to run the country. Well, I say “best”, but perhaps “least worst” is more suitable. American comedian Rich Hall presents a new documentary looking back at past US Presidential Elections, and shows that the race to the White House has also had its past personal battles and dirty deeds done behind the scenes. If you think that the hostility between Donald Trump and Hillary Clinton is a modern phenomenon, then you are mistaken. Rich Hall’s Presidential Grudge Match is on BBC Four at 21.00.