I think you have an overblown idea of executive power; RR, just like BO, was not the law. I just think it’s silly to cry for the enforcement of laws we believe to be ridiculous. Better that everyone of us march to NBC’s Washington bureau with 30-rd mags in our hands daring them to arrest us.
It is ridiculous, and that is the point. A magazine, high capacity or not, a rifle, pistol or revolver are simply inanimate objects that do not harm on their own. So there is Gregory, not harming anyone with his magazine, other than advocating to eliminate our 2nd Amendment Rights. He needs to learn a lesson and it makes a point about how ridiculous a law is.
Thats exactly the point of why we want Gregory arrested. If we all marched into DC waving 30 round mags, we would all be immediately be arrested. David Gregory would not. THAT is the issue.
And yes, the head of the executive branch does indeed have the ability to display evidence for the public. Police chiefs do it every day. A president can most certainly display some crack that DEA agents have seized. Afterwards, he returns it to the agent who gave it to him, to return to it evidence or send it for destruction. A news reporter has no such right.