The speed and rhythm of his speech are no accident, they are well practiced and executed, the psychological effect is persuasive.
His posture and posturing are also no accident, ready made for the gullible sheeple.
While there are many reasons why bho has all of these fawning dupes, I think the biggest single reason has to do with the fact that these people almost certainly went to government schools. Teachers and administrators long ago abandoned teaching and educating to became "Change Agents"