Sheriff Richard Vaughan of Grayson County, Virginia has also stated that he will screen and deputize citizens. See the link provided and go down about 1/3 of the way and read where it says "Vaughan's Proclamation."
Grayson becomes 2nd Amendment sanctuary | GalaxGazette.com
What this Sheriff is doing is a work around. In effect he'll background check and then deputize any non prohibited person who wants to retain a weapon that is prohibited under the law using a LEO exemption. That will work as long as he continues to be the Sheriff in Grayson County.
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There's a distinction that needs to be made here.
A county Sheriff is an elected official and he is accountable to the people who elected him.
On contrast, a chief of police is more often than not either a straight up political appointee, or he or she is a civil service employee who is accountable to the elected officials over them (the mayor, city council, etc). The difference between the two is small. An appointee serves at will and can be terminated for no reason. It takes about 30 days longer to get rid of a civil service police chief.
That's why the vast majority of law enforcement support for 2A rights comes from county Sheriffs. They are accountable to the voters and if a majority of voters in the county are pro gun, they'll be vocal in their support of 2A rights. Most Sheriffs also recognize
and voice that response times in rural areas are long and that citizens are responsible for their own self defense as law enforcement will never arrive in time to stop an assailant.
Police chiefs recognize that an 8 minute urban or suburban response time is just as useless as a 30 or 40 minute rural response time. However, most of them won't say it publically, and they won't make pro gun statements if the elected officials they report to do not have strong pro 2A agendas. Why? Because they'd be fired.
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Keep that in mind when you start talking about 2A sanctuaries. At best it means the Sheriff and the deputies will all be "too busy" to go out and confiscate weapons, or assist other agencies to do so. But keep in mind many states give local LEOs statewide jurisdiction, and there will still be state and federal officers who'll step in to do the job.
If you think most LEOs would refuse you'll be sadly mistaken. Most are not gun people and quite frankly a growing number would be happy to see citizens disarmed for a variety of reasons. And, if you own weapons that are now banned and you have not turned them in, you're now in that non law abiding citizen category and you'll be treated as such - more so because you are armed and obviously not in support of the law or enforcement of the law.
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Ultimately, the whole concept of a "2A Sanctuary" is nothing more than a protest movement. Rather than pushing for local elected officials to proclaim 2A sanctuary status your time is better spent making it clear to state and federal level officials that their political careers are at risk if they pass these laws in the first place.
To accomplish we have to get the moderates, who don't have strong feelings one way or the other about gun rights, on our side. We can't afford to come off looking like a bunch of irresponsible rednecks, or insensitive right wing extremists as that will turn those moderates against us. Instead we have to come off as responsible gun owners who have wives and kids and jobs and normal civic activities like everyone else.
For some, that will mean filtering opinions on gays, immigrants, affordable health care, abortion, and other issues where moderate may have much stronger feelings than on guns. To keep our 2A rights, we need to identify common ground (such as why a threat to 2A rights will evolve into a threat to 1A rights, etc) and common cause, rather than continuing to divide ourselves against each other. It'll mean making some compromises in our world view for the good of all and developing tolerance for the rights and interests of others in exchange for tolerance for responsible gun ownership from people who otherwise don't care.