So Bush increased the national debt by your correct figure of 42.5% in 8 years time. That's bad, I'm sure everyone will agree. But Obama at 16.4%? Obama's increase in national debt by dividing $5.65T/$14.84T ~ 38.1% overall since 1980, with the 35.8% figure being the increase in debt from the total $10.1T starting in '09. If Obama wins the '12 election and we have 4 additional years of spending at our current rates, the debt will be approx. $21.9T in '16. $21.9T-$10.1T=$11.8T increase, a 116.8% increase in 8 years since Bush left office.