The firsts US presidential debate took place this week and has already created a firestorm of commentary. It has been dubbed the “worst presidential debate in history” owing largely to US president Donald Trump’s churlish behavior throughout. But as the eyes of commentators are focused on this latest entry in the long-running freak show that is the Trump presidency, there is one YouTube video that raises a far more interesting question: why is it that the careerist Joe Biden is Trump’s opponent and not the far more popular and radical Bernie Sanders?