Kentucky Democrat Alison Lundergan Grimes and Sen. Kay Hagan (D-N.C.) have sent fundraising e-mails on behalf of Landrieu, who has -- for now, at least, -- been effectively abandoned by her national party, which lost control of the Senate on Tuesday.
"Mary Landrieu is the type of leader that puts aside partisanship and works for people. We need people like her fighting for us in Washington – that’s why we need to stand with her to make sure she wins her runoff," writes Grimes in a fundraising e-mail sent Friday.
The e-mail links to a donation page hosted by the liberal PAC ActBlue. "Join the nationwide moneybomb now and help raise $150,000 by Friday, November 7," the page says.
A similar e-mail was also sent out by Hagan. James Carville, a strategist supporting Ready For Hillary, a super PAC encouraging the former secretary of state to run for president, also asked donors to give money to Landrieu.
"Last weekend, Hillary campaigned in Louisiana because she knows how crucial it is for Mary to be re-elected to the U.S. Senate," writes Carville under the Ready For Hillary banner.
The Democratic Senatorial Campaign Committee pulled back its ad reservation in Louisiana at a time when Landrieu can use all the help she can get against Rep. Bill Casdidy. Pre-election polls showed Cassidy has the upper hand heading into Dec. 6. The National Republican Senatorial Committee has vowed to support him as needed.
The runoff was triggered because neither candidate received a majority of the vote in Tuesday's all-party primary.
Hagan lost to Republican challenger Thom Tillis, while Grimes failed to unseat Senate Minority Leader Mitch McConnell (R). Both Democrats were routinely among the most productive fundraisers in the country.
If Republican Dan Sullivan holds his lead in the Alaska Senate race and Cassidy wins, Republicans will have gained nine Senate seats. They needed six to win the majority.
Updated at 5:54 p.m.