Whenever there is a mass shooting, the Right does not call for more stringent background checks. Instead, the Right invariably blames "mental illness", not guns.
Example:
After shootings, GOP pivots to mental health reform
So now we have the VA identifying those who have mental illnesses to the
National Instant Criminal Background Check System (NICS).
The story in the OP link was based on a story from another source which was based on a story from another source which was based on a story from another source which was based on
a letter written by Senator Grassley to the VA about their criteria for forwarding a vet's name to the NICS.
I much prefer original sources than, in the OP's case, fourth- or fifth-hand sources.
The criteria the VA chose for reporting a vet to the NICS is that if the vet requires a "fiduciary trustee", then they are too mentally defective to own a gun.
A fiduciary trustee is a person or entity assigned to handle someone's finances because they are incapable of doing so, usually due to mental illness of one kind or another.
Apparently there are a quarter million vets who can't take care of themselves.
Senator Grassley feels the VA is interpreting federal law incorrectly and should only be referring those vets who are a "danger to themselves or others" to the NICS.