(CNN) - Democratic candidate Elizabeth Warren pulled in $5.7 million for her Massachusetts Senate bid in the last three months, her campaign announced Wednesday.
The two candidates are considered strong front-runners in their respective parties ahead of the state's Senate showdown in November.
Widely expected to be a toss-up, the race has already heated up with both campaigns and outside groups running ads and web videos.
Warren, a former adviser to President Barack Obama during the formation of the Consumer Financial Protection Bureau, took out $1.6 million in television ad buys last month, alone.
For the last three months, her campaign reported the average contribution totaled $64 and boasted a contributor list of about 23,000.
While Warren raised more than Brown in the final quarter, her September entry into the race put her $6 million cash-on-hand numbers well short of Brown's $12.8 million war chest.
Responding to Wednesday's fundraising figures, the Massachusetts Republican Party issued a statement calling into question the source of Warren's haul.
"Elizabeth Warren is being financed by extreme liberal special interests from outside Massachusetts," the statement read. "As the intellectual founder of the radical Occupy protests, she has a national network of left wing supporters eager to open their wallets to finance her agenda of bigger government, higher taxes and more debt."
Massachusetts Democrats blasted Brown's fundraising figures Monday, calling them a result of big bank financing.
"It's no surprise that Wall Street and the big banks continue to finance Scott Brown's campaign because he continues to put their interests first, ahead of middle-class Massachusetts families," Kevin Franck, a Massachusetts Democratic Party spokesman, said in a statement.