The source of this graph is this article. Note that, according to Gallup, the daily tracking average had been rising bit-by-bit for the past three quarters.
According to Gallup's presidential approval comparison application, Ronald Reagan's approval was at 49% and growing, while Barack Obama's approval is at 41% at the same time after their inaugurations.
The Davids (Plouffe and Axelrod) have their hands full this election cycle!