Per the US Treasury, on 9/30/00 (i.e. before your favorite prez was elected), the national debt stood at $5.674 trillion. As of 9/30/05, the national debt was $7.932 trillion, making for an increase of $2.26 trillion (not $1.2 trillion).
http://www.publicdebt.treas.gov/opd/opdhisto4.htm
$2.26 trillion is smaller than $5.674 trillion. How did he borrow more than everybody before him combined?