People vastly overestimate their accuracy with a firearm. I want to say military doctrines/history generally show 100-300 meters as "the sweet spot" for a military rifle... with independent studies tending to put that at closer to 10-30 for an individual. Optics CAN help that (it stops being "line up your sight picture" and instead "pull the trigger when the dot is on the thing you want to kill") except that... most people don't have the time or resources to actually zero those properly. And this gets even worse for pistols.
This is why the vast majority (to the point I would almost say "all") of political assassinations are either a full on military hit squad... or a lone gunman at point blank range. Lincoln, Reagan, Abe, even the dude what looked vaguely like Luigi. Which... there are a LOT of reasons people are so suspicious of the murder of JFK to this very day.

Clearly those cowards in the military can't protect him. So he'll call in ice to do it instead. And if they happen to run a reign of terror in the process? Boys will be boys.