William Shatner and The Tonight Show have made fun of Sarah Palin's book and Twitter account so much that you wondered when Palin herself would seek her revenge. I wasn't sure she ever would, but I guess it's more likely that she'd appear with Conan than Dave.

Last night, she showed up.

David Letterman made a joke the other night about Sarah Palin's daughter going to a Yankees game and being impregnated by Alex Rodriguez (video below). Now, humor of the joke aside, can you imagine if a conservative host had made a joke about one of President Obama's daughters? What do you think the media's reaction would be? I think the joke is more about Rodriguez and his alleged antics with other women, but it also incorporates Palin's daughter in a rather unfortunate way.

[via Jim Treacher]