The audit, conducted jointly by the attorney general’s office and the Virginia State Police, found that the requirements to acquire a concealed carry permit in 25 of the 30
states currently recognized by Virginia weren’t strong enough to keep a person from obtaining a permit who would be disqualified under Virginia law.

Those who would be disqualified in Virginia include

people convicted of a felony,
domestic abuse,
or drunk driving.
Mentally ill people and
those dishonorably discharged from the military

are also barred from carrying handguns in Virginia.

The Gun Control Act (GCA) makes it unlawful for certain categories of persons to ship, transport, receive, or possess firearms.
18 USC 922(g). Transfers of firearms to any such prohibited persons are also unlawful. 18 USC 922(d).

These categories include any person:

Under indictment or information in any court for a crime punishable by imprisonment for a term exceeding one year;

convicted of a crime punishable by imprisonment for a term exceeding one year;

who is a fugitive from justice;

who is an unlawful user of or addicted to any controlled substance;

who has been adjudicated as a mental defective or has been committed to any mental institution;

who is an illegal alien;

who has been discharged from the military under dishonorable conditions;

who has renounced his or her United States citizenship;

who is subject to a court order restraining the person from harassing, stalking, or threatening an intimate partner or child of the intimate partner; or

who has been convicted of a misdemeanor crime of domestic violence
(enacted by the Omnibus Consolidated Appropriations Act of 1997, Pub. L. No. 104-208, effective September 30, 1996). 18 USC 922(g) and (n).

Maybe it is the drunk driving charge?

I didn't know that renouncing your citizenship meant you can't own guns. That one is interesting.

An individual who has been convicted of a violation of Section 18.2-266 or a substantially similar local ordinance, or of
public drunkenness, or of a substantially similar offense under the laws of any other state, the District of Columbia, the United
States, or its territories within the three-year period immediately preceding the application, or who is a habitual
drunkard as determined pursuant to Section 4.1-33.

Imagine if driver's licensing was so stringent. ...

If you ever researched or obtained a non-resident CCW permit, you've heard the advise it's best to get multiple permits with overlapping reciprocity. 
The reason for this is states can, and do, change their reciprocity agreements to no longer honor specific states' permits.  It's good to have two permits
accepted in a state, preventing you from getting jammed up if "caught" carrying a concealed firearm with a permit that's no longer valid there.

Virginia is the latest example of this.  They just withdrew their reciprocity agreement with 25 of the 30 states they have honored for a very long time.

Maybe it is the drunk driving charge?

I didn't know that renouncing your citizenship meant you can't own guns. That one is interesting.