In terms of adding to the national debt, Shrub added $4.5 trillion. Thus far Obama has added $2.0 trillion, but he's still working on it.

In fairness, a good amount of deficit in Obama's first year were the economic band-aids aimed at fixing the damage done by Shrub (and introduced during the latter months of Shrub's administration).
Parsimony is not a trait of the American body politic.