"Well," said the Queen, "the most important thing is to surround yourself with intelligent people."
Obama frowned. "But how do I know the people around me are truly intelligent?"
The Queen sipped her tea. "Easily dear. Simply ask them to answer an intelligent riddle." She pushed a button on her intercom. "Please send Tony Blair in here."
Tony Blair walked in. "Yes, Your Majesty?"
"Answer me this please, Tony. Your mother and father have a child. It is not your brother and it is not your sister. Who is it?"
Without pausing for a moment, Tony Blair answered, "That would be me." "Yes! Very good," said the Queen.
Obama went back home to ask Joe Biden the same question. "Joe, answer this for me. Your mother and your father have a child. It's not your brother and it's not your sister. Who is it?"
Biden said "Let me get back to you on that one." He asked each of his advisors, but none could give him an answer Finally, Biden ran into Sarah Palin at a restaurant. Biden asked, "Sarah, can you answer this for me? Your mother and father have a child and it's not your brother or your sister. Who is it?"
Sarah Palin answered right back, "That's easy, it's me!"
Biden thanked her and went back to speak with Obama. "Say, I did some research and I have the answer to that riddle. It's Sarah Palin!"
Obama rose, stomped over to Biden, and angrily yelled into his face, "No! You idiot! It's Tony Blair!"