This week, with the dust still settling around an almighty ‘October surprise’ given to us by Donald Trump’s COVID-19 diagnosis, hospitalisation, and return to the White House, we focus on the polling – looking at how and why we use polls during campaigns, what the latest polls are telling us about the vote in November, and where gambling markets fit into the picture. We then round up these week’s stories and campaign developments, including a profile of a heroic fly who managed to dominate reaction to the Vice-Presidential debate.