In 2008 Ras had Obama up 52%-46% in their final poll. I don’t think that represents an example of a too close to call instance. I do recall that during the campaign they had some polls that showed McCain and Obama essentially tied.
Rasmussen’s final 2008 poll was spot on. Final poll result 52-46. Actual election result 53-46.
Obama performed a couple of points better on election day in swing states than he did in Rasmussen’s final polling. I’m not sure if hat was due to massive vote fraud or gotv efforts.