A guy dies and gets to heaven and is surprised to see a large wall full of clocks. He asks St Peter what they're for?
St Peter says they are "lie clocks." Every time a person lies the hands move one second. He points to Mother Theresa's clock and proudly tells the guy the hands have never moved. Then he shows him George Washington's and the hands have only moved a couple of seconds, indicating that George was pretty honest.
Then the guy asks to see Hillary's clock. St Peter tells him that they keep that one in Jesus's office, and he uses it as a ceiling fan.