Republicans are ecstatic over the latest Gallup poll showing their party leading the Democrats by four points on the generic ballot.  While this is undoubtedly good news for the Republican Party, let's recall that the last time Republicans led the Gallup generic ballot was . . . September 2008.  That didn't turn out so well.  Sure there was a black swan event in the interim that kind of turned things on their head, but that's also the point -- a year is plenty of time for things to be turned on their head.