Felix Salmon: This move is about optics as much as it is about reality: with the unemployment rate now below 8%, a key Republican talking point has been neutralized. And for the wonkier types, Obama can now say that he’s created more private-sector jobs in the past four years than George W Bush created in eight. Indeed, if it weren’t for public-sector job losses — exactly the kind of spending cuts that Republicans claim to love — the unemployment rate right now would have a 6 handle. Those optics explain the frantic and ignoble conspiracy theories from the Republican side: they’re trying to alter perceptions of the number itself, even if they can’t alter the effect that rising employment has on the electorate’s propensity to vote for Obama. Because it seems as though rising employment is giving a significant boost to Obama’s re-election chances — and that from here on in, it will only be helped by the 7.8% headline unemployment rate. It’s a little bit depressing that 7.8% counts as low, for these purposes, but clearly it does — especially considering that it has come down 1.2 percentage points in the past year. I don’t know how much credit Obama can really take for that, but America, right now, seems to be willing to give him the benefit of the doubt.