TexasCHLforum.com

I don't know that the Fourth Amendment would apply. The issue is the Supremacy Clause of the Constitution which states that federal law is the supreme law of the land. In other words, just because Texas recognizes your car as an extension of your home doesn't mean that federal law has to agree.

Please go back and read what I was responding to.
According to the post, [pre-paid legal] is apparently telling people NOT to park at the PO and leave their guns in the car while they go in (which would be perfectly legal), but to park somewhere else and walk a longer distance (unarmed) to the PO.
If that's really what they are teaching, they are NOT teaching people to simply obey the law, because the law never prevented anyone from parking right outside the front door of the PO and leaving their gun in the car.

ATDM wrote: [Pre-paid legal service] still instructs to park elsewhere to lock the gun in the car and then walk to the post office.

If that's the case, then [Pre-paid legal service] is a bunch of idiots.
Why would I intentionally park farther away from where I need to go, and walk a longer distance unarmed than I have to?