Elizabeth WarrenElizabeth Ann WarrenOvernight Regulation: Net neutrality supporters predict tough court battle | Watchdog to investigate EPA chief's meeting with industry group | Ex-Volkswagen exec gets 7 years for emissions cheating Overnight Tech: Net neutrality supporters predict tough court fight | Warren backs bid to block AT&T, Time Warner merger | NC county refuses to pay ransom to hackers Avalanche of Democratic senators say Franken should resign MORE is making a final fundraising push in hopes of bringing in $200,000 before the year's end.

Warren's chief of staff, Mindy Meyers, issued a positive email to supporters touting the "incredible" thing the Warren campaign accomplished in winning based on what she calls in the email "true grassroots" support.

Warren will be sworn in as Senator soon, but "in the meantime, we want to help pay off our final, year-end bills and prove again the power of our strong grassroots campaign," Meyers says.

The email adds that the campaign has set a high bar for its final push: $200,000 by Dec. 31. It was sent to supporters on Thursday afternoon, just four days ahead of that deadline — a relatively steep target for post-campaign fundraising.

Warren finished one of the nation's most expensive senate competitions against Sen. Scott Brown (R-Mass.) over $400,000 in debt, even after raising $42 million for her bid.

Her campaign has previously issued a number of similar pleas to supporters, asking for help in retiring her debt.