He talks the way he does because he is a quadrapedic. You notice that by the way he breathes when talking..
One could say he talks that way to control stuttering, too. Certainly it could be a factor. He’s obviously capable of hitting higher notes and talking faster, and elects not to do so.
Nevertheless, my earlier post was addressing the effect, not the cause or Krauthammer’s intentions.
Regardless the reason anyone does it, low and slow is powerful speech.