One of the challenges for Joe Biden ahead of debating Sarah Palin in 2008 was not to look overly patronising in conversation with a VP candidate coming off the back of a series of gaffes.
He’s not following a similar path this time. How do you define this reaction? Disbelief?
Ryan, to his credit, is not allowing himself to be distracted, sticking to his points. The risk for Biden is that his chuckling and eye-rolling becomes annoying for viewers. He’s just about sticking to the right side of the line at the moment.