He's a creation. He's not even a real person. A Manchurian Candidate, but built from the ground up. I wonder how much agency he actually has ultimately. Maybe he has some actual talent behind the scenes. We've seen that he's pretty much on MLK's tier with his public speaking. If the script is good, he's good. But that's it. Worse in fact, because his stutter reveals his actual speed and dexterity of thought (not like a regular stutter at all which manifests differently).