BTW, do you have sources for that info? I'd love to use it in a debate w/someone at work.
I got it from an archived pdf I downloaded from http://www.whitehouse.gov/omb/budget/fy2006/ Historical Tables, Budget of the United States Government, Fiscal Year 2006
I took my numbers from the 2005 release. The new 2006 release shows the 2005 budget was actually 20.3% of GDP not 19.9% as I posted, but everything else is still accurate. All of Dubya's budgets have had lower spending in terms of GDP than the Reagan/Bush budgets.