Well, there's a few pretty obvious reasons. The main one being the consequences. Additionally, one would require the means and opportunity to do it and the time to plan it. Also consider that America is a huge place and the president doesn't bother to visit every part of it. Someone who was inclined to do that may have to travel hundreds or thousands of miles to try. Lastly, the idea of taking a human life is abhorrent to most people.
One of my favorite things is giving fantastic creatures ordinary human names. My group will never forget Walter the minotaur who did absolutely nothing interesting aside from being named Walter.
I mean, do you really want the military to go, ‘hey, we know y’all elected this guy, but we don’t like him, so we’re going to just get rid of him’? Just because they’d be getting rid of a guy we don’t like this time doesn’t make it a good thing.
No, but I do want them to refuse to follow illegal orders.
Great shading and I love the hair.