In 2010 Total income was about 2.1T and total expenses were about 3.5T. Defense was about 23% of spending and discretionary spending was about 12%.

3.5T * (100% - 23% - 12%) = 2.275T

So thats still about a 175 Billion dollar deficit.

Admittedly 2010 was a below average year in terms of the US economy. In better years things might not look as bleak.