How accurate are ACT’s poll ratings? Part 1

On Saturday, I had the opportunity to listen to a talk by Christopher von Marschall, author of Barack Obama – der schwarze Kennedy (“Barack Obama – the black Kennedy”), which by all accounts is a well-researched and well-written analysis of Obama’s career to date. For his research, von Marschall began attending Obama campaign events in 2006, so the book isn’t the sort of dashed-off, quick-money affair I thought it might be.Discussion at the talk inevitably turned to current opinion polls and whether they were accurate enough. As would be expected, von Marschall pointed out the possibility of the “Bradley effect”,...