So Romney will now go back to claiming Obama subtracted jobs. But there’s a new twist: Romney will claim that the effect of the stimulus has been to destroy jobs. As it has in the past, the Romney camp will justify this by pointing to a bogus metric — the net jobs lost on Obama’ watch. That includes the hundreds and hundreds of thousands of jobs lost before the stimulus went into effect. Really: The Romney camp’s claim is that we can calculate that the stimulus destroyed jobs overall with a metric that factors in all the jobs destroyed before the stimulus took effect. That’s not an exaggeration. It really is the Romney campaign’s position. It’s time to ask Romney himself to justify it.