Reagan was very good at delivering effective pauses, looking the camera and world leaders in the eye, and acting like he was CLint Eastwood, even at times he didn't know what was going on.
IMO, if Bush had a good acting coach, he'd know not to pick his nose, use slang terms like "yo", and be a tad more stern in his negotiations with the Ruskies, who obviously don't respect a damn thing we say.
So yes, IMO every CEO, politician, and other person whose image invokes power (or a lack thereof) in a firm with many shareholders should have a little coaching.