The DSCC canceled its television ad reservations shortly after the Nov. 4 midterm election in which Democrats lost control of the Senate.
Landrieu advanced to a runoff against Rep. Bill Cassidy (R) in the Nov. 4 all-party primary. Save for limited ad buys from a handful of groups totaling about $216,000, Landrieu has had to face millions of dollars worth of pro-Cassidy ads on her own. The National Republican Senatorial Committee alone is on pace to spend more than $1.4 million on ads, records show.
A DSCC spokesman did not immediately respond to a request for comment.
Landrieu, who most close watchers see as a clear underdog in Saturday's runoff, credited her Senate colleagues for helping her, even as the national campaign arm left her behind. Sens. Cory Booker (D-N.J.) and Joe Donnelly (D-Ind.) have recently campaigned for her here in Louisiana.
"My colleagues have not walked away," she said.