I would think that most North Koreans with access to insecticide would also be fantasizing a biochemical attack on that slimy fat slug..... In reality the CIA would only need to plant a box of donuts heavily glazed with antifreeze icing since it seems the fat fluck gets to eat all the food.
I can't imagine it being easy for CIA to get their assassins into that country. The operatives would have to be South Korean so they don't stick out like a sore thumb. Not sure CIA has a lot of those little yellow snipers running around The Farm in Virginia.