Hillary to attend Landrieu NYC fundraiser
© Greg Nash

Hillary ClintonHillary Diane Rodham ClintonRoger Stone shares, quickly deletes Instagram photo of federal judge on his case Barack, Michelle Obama expected to refrain from endorsing in 2020 Dem primary: report Why the national emergency? A second term may be Trump’s only shield from an indictment MORE will headline a fundraiser in New York City for Sen. Mary LandrieuMary Loretta LandrieuLobbying world Former New Orleans mayor: It's not my 'intention' to run for president Dems grasp for way to stop Trump's Supreme Court pick MORE (D-La.) on Dec. 1, according to an invitation to the event. 

Landrieu is facing an uphill climb in her Dec. 6 runoff election against Republican Rep. Bill CassidyWilliam (Bill) Morgan CassidyCongress must step up to protect Medicare home health care Ivanka Trump to meet with GOP senators to discuss paid family leave legislation Bipartisan senators ask industry for information on surprise medical bills MORE, who is looking to unseat the Democratic incumbent. The cocktail event at a private home is the latest Clinton effort for Democratic Senate candidates in the midterms.

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Several potential Republican presidential rivals to Clinton have sought to tie her to Democrats' losses on Election Day. Sen. Rand Paul (R-Ky.) branded the vanquished Democrats whom she campaigned for as "Hillary's losers."

Recent polls show Landrieu trailing Cassidy by double digits.

She also suffered a setback when her bill approving the Keystone pipeline fell one vote short in the Senate this week. 

Landrieu pushed the vote to tout her energy credentials. A similar measure backed by Cassidy passed the House.

Clinton has not publicly shared her position on the Keystone pipeline, citing her role overseeing the process as secretary of State and claiming she can't "really comment at great length." 

Opposing the pipeline is a major cause among environmental groups. MoveOn.org this week called on her to voice opposition to it.  

Clinton campaigned in Louisiana for Landrieu ahead of the Nov. 4 elections. There has been some talk that a Clinton 2016 campaign would be able to expand its reach into Southern states where President Obama is unpopular, but others view that idea as overly optimistic.