Since Congress passed The Constitution's Appropriations Clause and the Congressional Budget and Impoundment Control Act (ICA) in 1974.
Because otherwise, the executive could just unilaterally shut down any part of the government at any time. Or siphon money from one department to another.
Which it can't by design, since congress controls the purse.
There's a process outlined in that act, under which the executive can report to Congress that it is reducing spending, and Congress must approve that reduction in order for it to take effect. That is the law of the land. The law is being broken.
If you don't like the budget, there is one governing body that can do something about it in this country. The legislature. They control spending, just like putting people in prison is controlled by the judiciary.
Strangely, all the people grousing about executive overreaches are dead silent on all this.
The sin has never been executive overreach, the sin was always an executive they did not control.
There’s a process to handle scenarios, where the administrative branch feels that more money is not needed to be spent for the purposes that the money was initially allocated for. At the very least, there is a 45 day process starting from the point that it is determined to be a “deferral of the budget process” (continuous days that Congress is in session) that is allowed for Congress to pass a rescission bill. I don’t believe Trump’s been in office long enough for that process to even have taken place.
I am not writing in support of funding cuts.
I am strongly supportive of stopping universities from skimming most of the funding, and the research getting a tiny bit. Student researchers doing the actual work get less than minimum wage.
If you are surprised by the 'less than minimum wage' part, it's a bit of creative accounting by universities counting a 'tuition waiver' as part of your wages.