I get a little bored repeating over and over that our short-term deficit is almost entirely not Barack Obama's fault. It's mostly the fault of the Bush tax cuts, the Bush wars, and the financial collapse that happened during the Bush presidency. At this point, though, this is more in the nature of a religious debate than a factual one, and conservatives are going to keep repeating the same tired disinformation about the deficit regardless of any evidence one way or the other.
Still, just on the off chance that a few people are still persuadable on this, it's nice of CBPP to update its chart showing the source of the deficit over the next decade. (Farther out than that, Medicare is largely responsible for most deficit projections.) As you can see, by 2013 or so, virtually the entire deficit is due to Bush-era policies/disasters. So cut this out and post it on your refrigerator.