I expect any and every cop to assume that I am armed. I see no reason that they should assume a CCW is a sign of good intentions. Husbands kill wives and children, why would they not kill a cop?

Carrying a gun at home where you can only hurt yourself and your own don't require any training in most states. When you go out in public, it does. The 2A left that decision to the states. It effected only the Federal govt when enacted.

Never argue with a cop at the side of the road, unless you have a camera running, and even then, be polite. You are going to lose, and that is why we have courts, where you might win.