Consumer advocate and Democratic Massachusetts Senate candidate Elizabeth Warren raised $3.15 million since announcing her intent to run for Senate, according to her campaign.

More than 11,000 Massachusetts residents donated, and 96 percent of contributions were for $100 or less, lending her fundraising a grassroots feel.

Her campaign emphasized that point in an email sent to supporters Monday.

"With the big banks and special interests lining up against us, we know it's going to take a strong, grassroots campaign to win," the email read.

Warren kicked off her campaign September 14 with a series of appearances around the Bay State, and before announcing her candidacy she conducted a listening tour in the state. Her message focuses on the working and middle class people she hopes to provide a voice for on the national stage.

Polls show Warren in a dead heat with Sen. Scott Brown (R-MA), who won his Senate seat in a special election after Sen. Ted kennedy (D-MA) died in office. The 2012 election marks Brown's battle for his first full term in the chamber.

Brown's fundraising is also strong: According to The Hill, he had almost $10 million cash on hand at the end of June, and raised $3.4 million in the second quarter. No official third quarter numbers are available yet. Before Warren had even officially entered the race, Brown targeted her in fundraising pleas.