I strongly doubt he has trippled America's debt. The national debt is the accumulation of annual budget deficits over the years. http://1stBlackPres.blogspot.com/
Sounds as if they are predicting that when they close the books in 2009 the national debt will be trippled. Thel debit when Bush left office was 9.5 trillion. By Fox New's estimates the national deb will be 28.5 trillion. Seems a bit absurd to me.