In Wisconsin, Walker Campaign Reports More Than $13 Million Raised Since January By the start of this year, Wisconsin's record for fund-raising by a candidate for governor had already been broken. Scott Walker, the Republican governor who faces a recall election, had collected more than $12 million. Then came the last three months - and more than $13 million, Mr. Walker's campaign reported on Monday. Whatever the standard price may once have been for an election in Wisconsin is long gone, swept away by a political battle in the state that began over collective bargaining rights but has come to be about nearly every issue. Mr. Walker, who was in 2010 elected to his first term, has raised some $25 million since the start of 2011. Of the more than $13 million he raised from mid-January to April 23, his campaign has spent more than $10 million, still leaving him $4.8 million as the June 5 recall election approaches. A group of Democrats are competing to oppose him, but have collected nowhere near as much. Under a little-noticed element of state law in Wisconsin, a candidate who is expected to be recalled is permitted to receive unlimited contributions until a recall is officially called (as it was in late March), and Mr. Walker has received donations as high, in some cases, as $500,000 from a single individual. His donors have included an array of well-known, national contributors to conservative causes and candidates. On Monday afternoon, Mr. Walker's campaign took care to note far smaller donations - more than 96,000 of them for $50 or less, the campaign said - as indicating grass-roots support for Mr. Walker. Tom Barrett, the mayor of Milwaukee who lost to Mr. Walker in 2010, has raised about $830,000, state officials said on Monday, as well as having money leftover from earlier campaigns. Kathleen Falk, the former executive of Dane County, reported raising nearly $1 million. Mr. Barrett, Ms. Falk and others will face one another in a Democratic primary on May 8.