It’s a huge and positive switch for Scott’s fortunes. Opponents made headlines when they easily collected 1 million signatures on a recall petition. Walker this week said he would not challenge the signatures-including names like “Donald Duck”-because there isn’t enough time before the May recall election.

While this makes sense tactically, it's a huge strategic mistake. Walker needs to highlight the dishonesty in the recall campaign, and the fraudulent activities of his opposition. Even if it's too late to invalidate the petition before the election, you want to document the criminal electoral frauds and prosecute them after the fact.