In a one-month period through January 17, Walker raised $4.6 million, according to figures reported to the state’s election board. His campaign is required to file a finance report by Monday that will detail contributions from January 18 to April 23.

Mike McCabe, director of the Wisconsin Democracy Campaign which tracks campaign financing, expects about $60 million will be spent by both sides during the recall election campaign of just over two months…

The latest finance report filed by the Walker campaign said 61 percent of contributions came from out-of-state sources from early December 2011 through mid-January.

“To see a candidate reach 10 percent from out of state was highly unusual and very noticeable,” McCabe said. “The kind of numbers that we have seen have no basis of comparison.”