From Business Insider:
Thus, the national debt under Obama will have grown by about $9 trillion, or an increase of 86%
http://www.businessinsider.com/national-debt-deficit-added-under-president-barack-obama-2017-1
And yep; Bush contributed some to that increase, but under Barry's regime, the biggest debt "generation" occurred. And what did Obammer do about it? $10 Trillion to almost $20 Trillion -- "it's a fact" !!