Those Democrats, they are all spend, spend, spend

An interesting graph: US public debt as per cent of GDP. And more. There a bit more to this than simple Presidential comparisons. To get a better picture, you would also have to look at the make up of Congress, but I believe you would probably find that the Dems would do far better there too, given their domination of Congress through all those years of declining debt and the predominantly Republican Congresses 1994-2006, just when that line starts rising.