Such sentences display such a weird understanding of how the federal government works. How can the administration “tighten its hold” over discretionary grants? These aren’t Congressional appropriations earmarked for specific projects. The administration is the only entity that can exercise control over these grants. It would actually be a huge problem if the administration didn’t have a tight hold on these funds. That would mean grants would be going out without close supervision by any elected officials (Congress or the President).
When people talk about "the Trump administration tightening its hold", they mean Trump and his political appointees exerting direct control over things that have a strong precedent for being out of their direct control.
Using the word "administration" to conflate the presidency with the layers of organization below it is the main premise of the "unitary executive theory", which is an extremely recent development of the current Supreme Court. Previously, when Congress said "such-and-such a decision is supposed to be made by the staff of agency XYZ, not by the President/Secretary personally", the courts assumed they meant it.
This was replaced with a system where it is very difficult to fire most civil servants but the executive could still select new hires (The Trump administration has tried the firing method via DOGE but with not much luck).
There is a common misconception that this reduces political influence and loyalty. This couldn't be further from the truth. What it did was ensure the civil services grew much further, since the only way the next political party in power could regain dominance was to hire even more civil servants until they overpowered the ones already there.
This meant it is even more important to get loyal ones, since they will be there for a long time and can't be fired. So now we have a large civil service full of loyal people that seemingly often sabotage each other, fighting one loyal group against another loyal group. It might be even worse than before civil service reform.
The purpose of civil service reform was to end patronage, not to insulate the civil service from political supervision. The idea was to have well-credentialed employees, instead of political donors, carrying out the policies of the elected President. It was not to have employees exercising power independently of the policies of the President.
The Pendleton Civil Service Reform Act was enacted in 1883. Four decades later, former President Taft wrote Myers v. United States, which still reflected the conventional view that the President was actually in charge of the executive branch.