It is always useful to examine the CBOs report on Budget and Actual on Discretionary spending. The above shows both by department. Clearly DoD is the biggest spender at $500 billion plus. HHS et al are second, as expected. What is surprising is HUD and Transportation with outlays more than twice the budget. What has happened.
The above shows the budget. There is well in excess of a trillion in discretionary, and one suspects much room for cutting.
Now the following is the kicker:
Namely Defense as expected overspent, never saw a program it could not justify, but HUD outspent all together. One wonders what snake is in that woodpile?