There's absolutely people chomping at the bit but without reliable support I think they'll not execute for various reasons. If there's any self-preservation or doubt that the public will just acquit anyone for these kinds of actions (probably best odds are medical insurance CEOs). Doing it all alone and not getting caught is just so damn hard.

Our hero really put themself out there. I'm wondering if they considered any other tools for the job. I hope we never find out, but did they know about the lack of security detail? If it seemed like they would be apprehended immediately, would they have waited for another opportunity? Maybe they have been close before, that would be something.