The post-Democratic convention bounce has not affected Presidential race dynamics. Where it may matter is at the Congressional level. The post-Labor-Day bounce has reached downticket races, a fact that has major implications for control of both the Senate and the House. Both chambers appeared to be on a knife edge in August, but for now that is no longer true. If the bounce sticks, the probability of retained Senate control by the Democrats is 88%, the same as the probability of the President’s re-election. But will it last?