(CNN) - The leading Democratic candidate in what could be one of next year's marquee Senate races is reporting a large fundraising figure.
Elizabeth Warren's campaign for Senate in Massachusetts announced Monday that they brought in $3.15 million in fundraising over the past month and a half. The former Obama administration official, consumer advocate, and Harvard Law professor is bidding to try and unseat Republican Sen. Scott Brown of Massachusetts, who Democrats think may be one of the most vulnerable GOP senators in next year's election.
A couple of hours after Warren's campaign announced their haul, Brown's campaign reported that they brought in $1.55 million in the third quarter of fundraising, with more than $10 million in the bank.
Warren set up an exploratory committee in mid August, allowing her to begin fundraising. She formally declared her candidacy for the Democratic Senate nomination in mid September.
In an email to supporters, Warren's campaign announced that 96% of the contributions were $100 or less, and that more than 11,000 people in Massachusetts made contributions.
Warren, whose Senate bid enjoys the strong backing of a number of leading national progressive groups, was named a special adviser by President Barack Obama to oversee the development of the newly created Consumer Financial Protection Bureau. This year she was in contention for –but was not nominated as– the director of the new bureau. She left Washington in early August and returned to Massachusetts, a move that stirred rumors she would launch a bid for the Senate.
The former professor joined a crowded field of candidates bidding for their party's Senate nomination when she announced, but none of the other contenders had strong name recognition. Some national Democrats were concerned that the other candidates would be able to effectively challenge Brown, who made national headlines by beating Democratic state Attorney General Martha Coakley in a special election early last year to replace the late Democratic Sen. Ted Kennedy, who'd held the seat for nearly five decades.
The campaign of Alan Khazei, another of those Democratic Senate hopefuls, announced on Friday that they raised $365,000 for the third quarter of fundraising, which ended on September 30, with three-quarters of a million dollars cash on hand.
Brown's $1.55 million in fundraising the past three months is down slightly from the nearly $2 million he brought in for the second quarter of fundraising. The campaign reports having $10.5 cash on hand.
"Scott Brown had another strong fundraising quarter and he will have the resources he needs to get out his strong pro-jobs message and run against whomever emerges as the Democratic nominee," said John Cook, Senator Brown's finance director, in a statement released by the campaign.
While the most recent polls indicate Brown remains popular in Massachusetts, the surveys also indicate Warren is competitive with the senator in hypothetical 2012 general election matchups.
– Follow Paul Steinhauser on Twitter: @PSteinhauserCNN.