NEW YORK ( TheStreet) -- Elizabeth Warren raised $3.15 million in the first stage of her campaign to unseat Massachusetts Republican Senator Scott Brown in November 2012. The funds, and Ms. Warren's background as a Harvard Law professor and force behind the Consumer Financial Protection Bureau, should make her tough competition for other Democrats looking to take the primary in September. Her entrance into the race in mid-September prompted two of her opponents to drop out of the race, leaving four still vying for the chance to compete for the Massachusetts Senate seat in November 2012. Alan Khazei, the only other Democratic primary candidate to release fundraising totals, said he has raised $365,000 in the third quarter and has $750,000 available. Republic Senator Scott Brown, who won a special election in the beginning of 2010 to complete Senator Edward Kennedy's term after he died of a brain tumor, said he has raised $1.55 million in the third quarter and has $10.5 million available. -- Written by Melinda Peer in New York.