A few more charts on the spending side of the US budget

To build on info related to the president's recently submitted budget:

Here's the breakdown on mandatory versus discretionary spending:

Here are the spending areas that are mandatory - meaning that they are required by law to be spent. Unless the law is changed, these areas have to be spent each year.

Here are the spending areas that are discretionary - meaning that they are not required by law and can be cut at will each year - assuming that powerful constituencies don;t get in the way.