(CNN) – Wisconsin Gov. Scott Walker's campaign raised $5 million in the last month, while his recall election challenger - Milwaukee Mayor Tom Barrett - brought in $3.1 million, their campaigns said on Tuesday.
Just one week out from the election, Walker had $1.6 cash on hand and Barrett had nearly $1.5 available to spend in this campaign, which has so far attracted millions of dollars of outside spending.
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Walker, a Republican, is facing Barrett after a two year fight over collective bargaining rights for public employee unions. Both parties have cast the debate as a larger referendum on the role of government and polices supported by both parties.
In a statement, Walker said his campaign received more than 54,000 contributions between April 24 and May 21, the majority of those below $50. His campaign said he had raised more than $20 million since the beginning of the year.
"More than 73 percent of our contributions were for $50 or less, showing that as the election draws closer, Governor Walker's grassroots support is as strong as ever," Ciara Matthews, Walker's campaign communications director, wrote in a statement. "Governor Walker's reforms have proven successful for the state by saving taxpayers more than $1 billion and helping to create more than 35,000 jobs since January 2011. It is because of this tremendous success that voters continue to stand with Governor Walker."
Barrett's campaign, meanwhile, touted the 27,000 new donors their campaign has brought on in the last two months. That includes time both before and after the May 8 primary, which Barrett won.
"It's clear Tom's support comes from tremendous energy from the grassroots, while Walker continues to raise unlimited money. And no Democratic candidate for governor in the history of this state has received this level of support," Barrett communications director Phil Walzak wrote in a statement.
Recent polling suggests Walker holds an advantage over Barrett, following months of funds channeled into the state from national groups and a consistent barrage of advertising.