Simple facts laid out for those keep believing Obama 'inherited' the debt among other things:

Clinton Administration
(January 20, 1993 – January 20, 2001)

National debt on January 20, 1993 = 4,188,092,107,183.60 (inauguration day)
National debt on January 20, 2001 = 5,727,776,738,304.64 (last day in office)

Bush Administration
(January 20, 2001 – January 20, 2009)

National debt on January 20, 2001 = 5,727,776,738,304.64 (inauguration day)
National debt on January 20, 2009 = 10,626,877,048,913.08 (last day in office)

Obama Administration
(January 20, 2009 – Present)

National debt on January 20, 2009 = 10,626,877,048,913.08 (inauguration day)
National debt on October 07, 2012 = 16,154,905,088,589.25 (and counting)

Reference: http://www.treasurydirect.gov/NP/BPDLogin?application=np