George Bush is with the Queen of England.

George: "Your Majesty, any tips you can give me to stay in power, the way you have been for so long?"
"Well" said the Queen, "The most important thing is to surround yourself with intelligent people."
George frowned and then asked, "But how do I know the people around me are intelligent?"
The Queen: "Easy, you just ask them to answer an intelligent riddle."
The Queen pushed a button on her intercom. "David Cameron, would you come in here, please?"
David Cameron walked into the room and said, "Yes, ma'am?"
The Queen smiled and said, "Answer me this please, David. Your mother and father have a child. It's not your brother and it's not your sister. Who is it?"
Without pausing for a moment, David Cameron answered, "That would be me, ma'am."
"Very good! Thank you, David!" said the Queen.
Then she turned to George with a smile and said "See?"
Now its George's turn to apply the same logic...
George went back to the USA and asked Jeb.. "Jeb, 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?"
"I'm not sure." said Jeb. "Let me get back to you on that one..."
Jeb went to his advisors and asked every one, but none could give him an answer...
Finally, he ran into Obama and asked, "Hey, 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?"..
Obama answered, "That's easy, it's me!"
Jeb said, "Thanks!"
Then he went back to George. "I did some thinking and I have the answer to that riddle. It's Barack Obama."
George slapped him. and shouted.. "No! You dumb idiot! It's David Cameron."