Assassination humor doesn’t play well in presidential politics.

(CNN) – During a speech before the National Rifle Association convention Friday afternoon in Louisville, Kentucky, former Republican presidential candidate Mike Huckabee — who has endorsed presumptive GOP nominee John McCain — joked that an unexpected offstage noise was Democrat Barack Obama looking to avoid a gunman.

“That was Barack Obama, he just tripped off a chair, he’s getting ready to speak,” said the former Arkansas governor, to audience laughter. “Somebody aimed a gun at him and he dove for the floor.”

You stay classy, Mike.