They've already started with registered Veterans. Registered with the VA, that is. Like Clinton before them, who dumped 90,000 vets into the NCIC and had them banned from ever buying a firearm again or keeping those they had.
I fully expect this A$$**** to try the same thing even though Congress passed (and GWB signed) several laws that specifically prohibit such actions.
A lot of vets failed to seek help for minor or even acute depression because of this fear and the VA had to overcome that so those vets could be helped with nonviolent depression. NOW..... ??? Heck, even Abraham Lincoln suffered from "melancholy" which was probably clinical depression.