David Shuster has put Karl Rove in his "Hypocrisy Watch" segment on 1600 Pennsylvania Avenue frequently, and as of yet, Rove has not responded publicly.

But through Twitter, the battle is on. "Before each segment I've sent Karl a Twitter message, asking him to come on and defend himself," said Shuster last night. "This weekend, I received the following Twitter direct response: 'Re: 1600. Wait until the book — you're in there!' Signed Karl Rove."

Although the direct message was private, Shuster has taken on Rove via @replies on Twitter over the past two days. "Next time, try defending yourself 'like a man,' — mano y mano as I've repeatedly invited you to do," wrote Shuster to Rove yesterday.

Follow Shuster here, Rove here, and...TVNewser here.

• Related: Over on RedState.com, it's Shuster vs. Erick Erickson.

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