That's a of a chart, Dan.
One thing not included from Bush 2nd that has impacted the level...the approval of TARP, at the request of the Bush administration, but not expended until the Obama presidency took effect. Lots of republicans blame all of that expenditure on Obama, but the authorization for it occurred at the request of
Bush, so some of Obama's expenditures should realistically be laid at Bush's door. Also, the continuation of the military expenditures under Obama have simply continued the Bush approvals.
Most of Obama's 'additions' to the debt have been the stimulus, 40% of which were tax decreases.
None of that matters, though, because the Republican Party has done, frankly, a brilliant job of hanging this debt around Obama's neck, and he has done a ridiculously poor job of explaining it. He deserves whatever he gets from this aspect.
But no one should imagine that the debt will improve under Republicans. They only talk about deficits when they are not in charge.
Remember Cheney's "Reagan proved that deficits don't matter"?