Actually, the joke is on all of us. Groannnnn!

A guy traveling through Mexico on vacation lost his wallet and all of his identification. Cutting his trip short, he attempted to make his way home but was stopped by the U.S. Customs Agent at the border.
May I see your identification, please?” asked the agent.
“I’m sorry, but I lost my wallet,” replied the guy..
“Sure buddy, I hear that every day. No ID, no entry,” said the agent.
“But I can prove I’m an American!” he exclaimed. “I have a picture of Ronald Reagan tattooed on one side of my butt and George Bush on the other.”
“This I gotta see,” replied the agent.
With that, the guy dropped his pants and showed the agent his behind.
“By golly, you’re right!” exclaimed the agent. “Have a safe trip back to
Chicago .”
Thanks!” he said. “But how did you know I was from Chicago ?”
The agent replied,
“I recognized Obama in the middle.” Groannnnnnn! 😀

~Steve~ H/T Jean