Washington (CNN) - The Democratic Senatorial Campaign Committee (DSCC) raised $127 million this past election cycle, the most they've ever brought in during a midterm election season.
According to records filed Friday, the DSCC raised $19.9 million from mid-October through mid-November, spending $33 million during that period.
While Republicans made a net gain of six seats in the midterm elections and seven in the overall cycle, Democrats did retain control of the chamber, and will have a 53 to 47 majority in the next Congress, including two independent senators who caucus with the Democrats.
"Senate Democrats beat back the Republicans this year in part because we outraised the other side," DSCC Executive Director J.B. Poersch said in a statement. "The Democratic Senatorial Campaign Committee broke several fundraising records this cycle – demonstrating a continued commitment from Democrats to prevent a return to the failed policies of the past."
The National Republican Senatorial Committee (NRSC) raised $112.3 million during the midterm election cycle, with $19.4 million raised and $30.8 million spent from mid-October through mid-November, according to numbers filed with the Federal Election Commission.
"The NRSC's strategic investments on behalf of our candidates nationwide paid off as we turned the tides and captured seven new Republican seats this cycle and elected 13 new Republican Senators on Election Night," NRSC Executive Director Rob Jesmer said in a statement. "We are grateful for the outpouring of support that we continue to receive from voters across America as we fight to rein in out-of-control government spending and restore accountability in Washington."
The NRSC heads into the next cycle with $519,326 cash on hand and a debt of $6 million. The DSCC has $713,000 in the bank and a slightly larger debt of $6.7 million.
In 2012, 23 of the 33 seats up for grabs are currently held by the Democratic coalition, with just 10 Republicans up for re-election.
–Follow Paul Steinhauser on Twitter: @psteinhausercnn