Clinton, the 2016 Democratic presidential nominee and former New York senator, is planning on speaking for Cuomo at the state Democratic convention in Long Island on Wednesday, a Cuomo spokeswoman confirmed to HuffPost on Monday.
The endorsement was first reported by The New York Times.
Cuomo faces former “Sex and the City” star Cynthia Nixon in the Sept. 13 Democratic primary. He is expected to receive the Democratic Party’s endorsement later this week, The Associated Press reported.
A Quinnipiac University survey published earlier this month gave Cuomo a 22-point lead over Nixon.
Clinton’s endorsement would mark her return to campaigning for a political candidate after her crushing defeat in the 2016 election against President Donald Trump.
Clinton and her husband, former President Bill Clinton, have a long history with Cuomo and his family. Cuomo served as housing secretary in Bill Clinton’s administration. He endorsed Hillary Clinton’s presidential run shortly after it was announced in 2015.
Nixon also expressed support of Clinton’s presidential campaign that year, telling Bloomberg News: “I am definitely a Hillary person.”
Clinton also recently recorded an automated phone call that endorses Stacey Abrams for Georgia governor, the Times reported. Abrams is the former Democratic leader in the Georgia House.
This story has been updated with additional details about the relationship between Cuomo and the Clintons.