A Vikings fan, a Bears fan, and a Packer fan

Three guys: a Viking fan, a Bears fan, and a Packer fan are out walking together one day. They come across a lantern and a Genie pops out of it.

"I will give you each one wish, that's three wishes total," says the Genie.

The Viking fan says, "I am a farmer, my dad was a farmer, and my son will also farm.
I want the land to be forever fertile in Minnesota."
With a blink of the Genie's eye, 'POOF' the land in Minnesota was forever made fertile for farming.

The Bears fan was amazed, so he said, "I want a wall around lllinois, so that no infidels, Viking fans or Packer fans can come into our precious state."
Again, with a blink of the Genie's eye, 'POOF' there was a huge wall around Illinois.

The Packer fan says, "I'm very curious. Please tell me more about this wall" The Genie explains, "Well, it's about 150 feet high, 50 feet thick and completely surrounds the state; nothing can get in or out."

The Packer fan says, "Fill it up with water."