Comment: Due process was provided when they were considered disabled and eligible for SSI.  It was further provided when they were adjudged to require a cxonservator.  If you wish to address "due Process", let's do look at "felons."  Do you think it's reasonable to apply the standard to exclude a person convicted of tax evasion from purchasing or owning a firearm as applied to someone convicted of armed robbery or attempted murder?  The ineligibility for firearm ownership was determined by "status" and, in the case of felons, that's a very broad status.  Felons can "recover' their Second Amendment Rights, but it requires legal action on their part to do so. 

 Frankly, I would suggest those severely mentally-ill individuals who were excluded by the Obama Order were more of a danger than most felons.