On the eve of the second debate, and with at least one poll (Gallup’s) showing Romney up to 50 per cent (when did that happen?! Oh yeah, then…) the ever excellent Nate Silver has this balanced and evidence-based analysis of the typical/variable impact of debates on polls and final election results. Nate closes by reminding us that round two is just as crucial as round one. Given Obama’s dreary showing on first go it’s possible to view this as both a blessing and a curse. Personally I’m tempted to turn my ‘phone off and hide under the duvet.
There is no evidence, incidentally, that the second presidential debate is any less important than the first one. On average, it has moved the polls by 2.3 percentage points in one direction or another — almost exactly the same as after the first debate, which moved them by 2.4 percentage points on average.