Everyone should know what this is and how and why it is done.
In short, Republicans want to starve a department of funding to a level below which they can not properly function. Then they can claim that agency isn’t doing it’s job, so we might as well cut it altogether. They are trying to set up these departments and programs to fail and can come in and claim they are saving taxpayers money. What they are really doing is making it easier for corporations and the ultra rich to pollute or side-step their tax obligations. Kind of hard to claim someone is a tax cheat if there isn’t an IRS to audit them. Same with the EPA, Amtrak, USPS, DoEducation, and a host of other departments.