Our president is smart:

"There's an old saying in Tennessee—I know it's in Texas, probably in Tennessee—that says, fool me once, shame on—shame on you. Fool me—you can't get fooled again."
—George W. Bush, Nashville, Tenn., Sept. 17, 2002 (as bad as this is, the audio is even worse)

If he fools us twice and is elected again, shame on us.

Want more Bushisms?