After he had pulled onto the left shoulder, and when I tried to get past him, I was able to pull ahead slightly before he started pacing me. That is the only time, I can tell, when he would have had a chance to see the license plate.
As far as when he first saw, I cannot say completely, but it appeared that the first time he really saw it was when I was reaching for it. Regardless, whether or not he was trying to protest is not my problem or concern. Nor should it be. Whether I carry it on my hip or on the dash, he has no right to threaten and act like he is attempting to do bodily injury. This is the same argument the DSP officer was trying to make...that I may have egged on the situation. Case law in DE has come down on the side of those that carry. Someone's discomfort or anger over seeing my firearm does not constitute a crime on my part and does not give someone the right to act the way he did.
"But when a long train of abuses and usurpations....evinces a design to reduce them under absolute despotism, it is their right, it is their duty, to throw off such government, and to provide new guards for their future security."