Kerry's mike is proper height.
It looks to me as if Bush has some pretty serious body armor under that suit jacket. Look at the ridge near the shoulder line. It is pushing his jacket up, kind of.
Do you suppose that is why Bush appeared to be so uncomforatble during the debate? My husband said that Bush seemed preoccupied, as if he had been told something that was distracting him. A death threat, perhaps, requiring the need to put on the bullet proof armor?