At this point in the election, both the national tracking polls and, generally speaking, the battleground state polls show an extremely close race. This has inspired much criticism of stat-man Nate Silver. Liberals, as Jonathan wrote recently, may be looking for a scapegoat if Barack Obama loses, and will wonder why Silver insisted that statistically Obama was an overwhelming favorite to win re-election right up to the end. Conservatives say that statistics don’t factor in momentum, that any predictive model that ignores trends should be taken with a grain of salt, and that current trends don’t back up Silver’s predictions of Obama as the heavy favorite.
Additionally, as Josh Jordan has pointed out at National Review Online, there are problems with Silver’s statistical model, which gives more weight to pro-Obama polls—even older polls—than to those showing Mitt Romney’s recent gains. Silver’s defenders respond that Silver makes no guarantees, and that giving Obama a high chance of winning doesn’t preclude the opposite outcome. This defense—essentially that no outcome can disprove Silver’s model—treads a bit too close for comfort to Chuck Klosterman’s classic rant about statistics: