Keep in mind,that was after 8 solid years of the SRM dumping raw sweage on Bush;Obummer has done it while the same media was pouring Holy Water on him.
Your amazement at these facts comes from the fact that you have a false premise: You wrongly think that press attitudes motivate voter attitudes. It does not. As the evidence clearly shows.
The truth is that moods and attitudes change based on their own internal dynamics, and not due to external events or propaganda. Were that not the case, booms and uptrending markets would feed on themselves without end, as would busts and market crashes. Fortunately, in the real world, markets and economies turn up for no apparent reason right when the news couldn't possibly be worse, when "the blood is running in the streets."
For proof, look at recent history. March 2009 was the time to buy, not to sell. It was also the time to go short on Obama—in spite of the fact that his popularity was at its peak, and in spite of the fact that the MSM has been unrelenting in its pro-Obama propaganda.