Blatently stolen from the National Review Online.

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A Liberal Republican Senator from Pennsylvania and a President — both running for reelection — need to cross a river. The Liberal Republican Senator asks the President to carry him across on his back.

“But you’ll sting me,” says the President.

“Of course I won’t, says the Liberal Republican Senator. If I do, we’ll both drown.”

The President thinks this is logical, and so allows the Liberal Republican Senator to climb on his back. They hop into the river and are about halfway across when the Liberal Republican Senator stings the President. As they both begin to drown, the President asks, “Why?”

The Liberal Republican Senator replies, “I can’t help it. It’s in my nature.”