This short 2:47 minutes video is very well documented as well as easy-to-understand. Please take a moment to view it. It will clear up any doubts in your mind about which Presidents were responsible where we are today with the U.S. Debt Crisis.
How do the Obama deficits compare with past presidents? And how did the national debt get so big anyway. This video tries to answer those questions by looking at the debt as a road trip and seeing how fast different administrations have been traveling.
Historical debt data: http://www.treasurydirect.gov/govt/reports/pd/histdebt/histdebt.htm
Inflation data: http://www.westegg.com/inflation/
Future debt data (2010 - 2016): http://www.whitehouse.gov/omb/assets/fy2010_new_era/Summary_Tables2.pdf