There was a bet at the time she came into office that she would last less than an iceberg lettuce because of her outrageous policy proposals. She lasted 45 days before the pension funds collapsed and she was replaced, meanwhile, the lettuce persevered in its side dish career.
It's great because it started out as a sarcastic joke, but as her premiership progressed, there was a sense of dawning hilarity as we realised that she actually wasn't going to outlast the lettuce.