US GDP

Looks like the US GDP is at about 13.2 trillion for 2006. A 15% tax rate on consumer spending would deliver $1.9 trillion, which would have to be split between federal, state, and local government. Current federal budget is around $4.5 trillion; total of all state budgets in the nation is $1.3 trillion; muncipal budgets are probably in the $1-$2 trillion range, but I haven't found a source set.