Well, at least he didn't say he was a donut.
See, that one worked for JFK, because it was endearing, not to mention hilarious ... to the audience, that is, as you can hear in a recording of the event. The huge outburst of laughter instantly transformed into cheers.
Now suppose he had stood up there and said, "Heil Hitler."
I wonder how many understand your reference to JFK? :0)