Just in the interest of precision: it's actually our national debt which is approximately 14.6 trillion. Our deficit this year will be closer to 1.5T.
http://www.cbo.gov/doc.cfm?index=12039
Not that they aren't both mind-boggling numbers
By 2021, the budget deficit would be about double the baseline projection, and with cumulative deficits totaling nearly $12 trillion over the 2012–2021 period, debt held by the public would reach 97 percent of GDP, the highest level since 1946.
Adding in this year's deficit, it comes out to $13.5 trillion.