Hillary to attend Landrieu NYC fundraiser
© Greg Nash

Hillary ClintonHillary Diane Rodham ClintonGrassroots America shows the people support Donald Trump Ex-FBI official: 'Links and coordination' with Russia happen everyday Ex-FBI agent: Americans should be 'disgusted' by Russian interference in Mueller report MORE will headline a fundraiser in New York City for Sen. Mary LandrieuMary Loretta LandrieuDems wrestle over how to vote on ‘Green New Deal’ Lobbying world Former New Orleans mayor: It's not my 'intention' to run for president 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 CassidyGOP senator issues stark warning to Republicans on health care Bipartisan senators offer bill to expand electric vehicle tax credit Menendez, Rubio lead Senate effort to regulate Venezuelan sanctions 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.