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. . . is sauce for the gander.

The (in)famous Obama-Joker poster

Bush as the Joker in Vanity Fair

Several comments come to mind, other than "what's sauce for the goose is sauce for the gander."

"You can dish it out but you can't take it."

"Dissent is the highest form of patriotism."

"The truth hurts, doesn't it?"

And, of course, from the movie The Dark Knight from which the Joker makeup comes: "Why so serious?"

Update: Here's the deal--if you find one of these images upsetting but not the other, you are a rabid partisan at best, or a rank hypocrite at worst. If you're offended by both of them, then you have a well-developed sense of fairness (and you're also a bit naive about politics in general). If you're able to at least find a chuckle in both of them, then you're a fairly emotionally balanced, stable person.