Many of us in the econ biz were wondering how the new leaders of Congress would respond to the sharp increase in American economic growth that, we now know, began last spring. After years of insisting that President Obama is responsible for a weak economy, they couldn’t say the truth — that short-run economic performance has very little to do with who holds the White House. So what would they say?

Well, I didn’t see that one coming: They’re claiming credit. Never mind the fact that all of the good data refer to a period before the midterm elections. Mitch McConnell, the new Senate majority leader, says that he did it, that growth reflected “the expectation of a new Republican Congress.”