In twenty five years on the road I’ve never tried to influence legislation or send people to war, so my answer is no.

The politician-as-comedian is the hardest trick to pull off. Whatever you think of him as a president, there is no denying that with a script in front of him, Barack Obama can deliver a joke with timing and poise. Others – notably Boris Johnson – can be genuinely funny off the cuff. But most politicians are neither natural actors nor naturally witty: a large number of people who go into politics are dry, humourless policy wonks. Watching them deliver a joke – or, worse, come up with one themselves – is like watching the ape-men around the obelisk at the beginning of 2001: A Space Odyssey: they know it’s important, but its workings are a mystery.