(CNN) - As he fights to keep his seat on Capitol Hill, Republican Sen. Scott Brown of Massachusetts brought in $3.4 million during the first three months of the year, his campaign announced Friday.
The amount marks a slight uptick in fundraising hauls over the previous quarter, in which he raised $3.2 million.
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On Friday, Brown's team also reported a whopping $15 million cash on hand as it gears up for the next six months of campaigning.
Brown and his likely Democratic nominee, Elizabeth Warren, have two of the thickest war chests among Senate candidates. Their high-profile race has gained national attention as Democrats see it as a chance to reclaim the seat previously held by the late Ted Kennedy, and won by Brown in a 2010 special election.
"The people of Massachusetts appreciate the independent, pro-jobs perspective that Senator Brown brings to each issue and they have rewarded him with yet another strong quarter of fundraising," said Brown's campaign finance director John Cook in a statement.
While first quarter figures have yet to come out on Warren's end, her campaign said Friday she had raised more than her opponent. Warren is a former advisor to President Obama.
In the last quarter, she took in $5.7 million alone, a huge sum that early on for a Senate candidate.
But Brown's team points to the high number (nearly 70%) of Warren contributions from outside of Massachusetts in the previous quarter. Drawing a contrast, Brown's campaign on Friday said 29% of first quarter donations came from outside the Bay State.
On Friday, however, Warren's campaign said this quarter had a strong showing from Massachusetts supporters, with $2.5 million pouring in from those living in the state–though the campaign did not give its total fundraising figure.
Recent polls put the two candidates in a statistical tie, with Brown slightly edging his opponent. The latest of which, conducted by the University of New Hampshire, indicated Brown slightly ahead with 37% of support to Warren's 35%. Meanwhile, 26% of voters said they were undecided.
Brown had a big week, however, with the signing into law of the STOCK Act, a law against insider trading among lawmakers, as well as the JOBS Act. The senator initially pushed both bills, adding color to his palette as seeks to paint himself as a moderate with bipartisan appeal.
Meanwhile, Warren has billed herself as the consumer advocate candidate and the one most supportive of middle class workers. Responding to Brown's latest fundraising report, the Massachusetts Democratic Party pointed to Brown's contributions from Wall Street.
“Scott Brown fights for Wall Street, not middle-class families in Massachusetts, so it’s no surprise that big banks and corporations have his back,” the state's party chairman John Walsh said in a statement.