What's even worse is that Jimmah was an Annapolis graduate with a degree in nuclear engineering. He helped design the nuke power plants for US subs while in the navy. I would have thought Admiral Hyman G. Rickover would have had him flayed alive and jettisoned out the nearest hatch for pronouncing it that way.
Jimmah is just using the Southern pronunciation, as GWB does. I only point out the inconsistency of no one ever making one comment about the way Carter talks. And you are right, his naval career was with nuclear ships, which should cause just a few pundits to comment. But, no...