Obama. In his own words, using his own rhetoric, applying his own measurement....
The total federal debt of the U.S. government has now increased more than $7 trillion during the slightly more than five and a half years Barack Obama has been president.
That is more than the debt increased under all U.S. presidents from George Washington through Bill Clinton combined, and it is more debt than was accumulated in the first 227 years of this nation's existence--from 1776 through 2003. The Debt rose $4.899 trillion during the two terms of the Bush presidency
When President Obama took office on Jan. 20, 2009, the total federal debt was $10,626,877,048,913.08. As of the close of business on July 30, 2014, it had risen to $17,618,599,653,160.19--up $6,991,722,604,247.11 from Obama’s first inauguration day.
By the close of business on July 31, 2014, it had risen to $17,687,136,723,410.59—up $7,060,259,674,497.51 since Obama first inauguration day.