Rep. Tammy Baldwin (D-Wis.) topped $1.1 million in fundraising in the last three months of 2011, her campaign announced Thursday.

Baldwin, who is running for the Senate seat being vacated by retiring Sen. Herb Kohl (D-Wis.), has more than $1.8 million in the bank heading into 2012. Her campaign said more than 16,000 individual donors had contributed.

“This shows our strength, and these resources will be critical in responding to the false, negative right-wing attacks sure to come our way,” the campaign wrote on her Facebook page.

The fourth quarter was less successful for Baldwin than the third quarter of 2011, when she raised $1.3 million. But it puts her far ahead of Mark Neumann, one of her Republican rivals, who pulled in $518,000 between October and December, according to the Wisconsin Reporter.

The other Republicans in the primary — Tommy Thompson and Jeff Fitzgerald — have not yet released their fourth-quarter figures. Tallies are due to the Federal Election Commission by the end of the month.