Yes, it was a joke. Yes, it seemed unscripted. But one never, ever, ever jokes about the possibility of a rival (or anyone, for that matter) being assassinated. Especially when many genuinely fear for that candidate's safety because of his race.
Such a remark isn't just wrong and graceless. It's downright dumb. Huckabee owes Barack, his supporters -- and, for that matter -- John McCain an apology.
Geez. With friends like Huckabee, neither Republicans nor gun owners need adversaries.