Gov. Scott Walker will not challenge any of the recall signatures.

With the deadline for the challenges coming at 5 p.m. today, Walker's campaign just announced that it faced "an impossible timeline" imposed by a Dane County Judge. The Government Accountability Board continues its review, however, with a March 19th deadline, and it might strike some signatures.

Walker’s campaign filed documents with the GAB on Monday saying that signature review needs to continue because it found a 10 to 20 percent error rate. And Walker attorney Steven Biskupic of Michael Best & Friedrich said that Wisconsin GrandSons of Liberty and We the People of the Republic, two tea party groups, had organized a “Verify the Recall” effort to review signatures, but campaign finance laws prevented them from coordinating with Walker.