It’s sheer will for him to continue talking, despite the constant whickering and whinnying going on behind him, and the flies that must be swatted with the long, hairy appendage attached to his nose, not to mention the flagellant noises that emanate from his mouth.
"Flatulent", perhaps?
He deserves to be flagellated, though ... he does a very poor job of representing these United States to the rest of the world.