In 2007 the US government plans on spending $2.8 trillion. In the year 2001, the outlays (how much the government spends) were $1.8 trillion. That means in 7 years government spending has gone up $1 trillion, which is a 155 percent increase! I should mention that the 2007 budget does not include Iraq, Afghanistan, and Katrina.
To see the evidence for yourself see the Government Budget for 2007 (pg. 3) and 2001 (pg. 14). (The page numbers are displayed on the bottom of Adobe Acrobat.)
