From Greg Mankiw:
If you are a deficit hawk who lamented the Bush budget deficits, the new administration's budget should not make you feel much better. President Obama will give us different fiscal priorities than President Bush did, but the borrowing and debt imposed on future generations will not be very different, at least if the numbers presented in the Obama administration's own budget document can be trusted.
During the period 2005 to 2007, the U.S. unemployment rate hovered in the ballpark of 5 percent. What was the budget balance? According to OMB historical documents, the budget deficit averaged just under 2 percent of GDP during those three years.
Now compare these results to the new Obama budget. According to their numbers, under their proposed policies, the budget deficit will average a bit over 3 percent of GDP during that time.