Veterans and gun rights
The Daily Caller reports that over a hundred thousand veterans are barred from gun purchase by the Brady Act background checks. The core problem is really GCA 68. That prohibits firearm possession or purchase by anyone found "mentally defective." What Congress meant by the phrase is anyone's guess. Its use had long faded out even by 1968. My speculation is that when Sen. Dodd was drafting the act, he copied it from some State statutes which themselves were ancient. Or maybe he copied it from a different statute.