President Clinton returning from a campaign stop in Arkansas is climbing the steps to board Air Force One. Under each arm he is carrying a souvenir of his trip -- a live razorback. At the top of the jetway he is met by the guard a Marine sergeant who issues a crisp salute. ""I'd salute you back Sergeant"" says the President ""but as you can see I've got my hands full."" ""Yes sir"" replies the sergeant. ""Very nice pigs sir. Very nice pigs."" ""Why these aren't pigs"" the President responds. ""T…