Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE said that suspected Russian hacking of Democrats this election cycle likely stemmed from Russian President Vladimir Putin’s grudge against her, sources at her “thank you” party for donors Thursday night told CNN.

Clinton rebuked Putin while she was secretary of State, suggesting that the Russian elections were unfair.

Clinton is pretty direct about why she thinks she lost: Comey + Russia https://t.co/XxE1AwNeNj pic.twitter.com/du2bWZJACx — Aaron Blake (@AaronBlake) December 16, 2016

According to an NBC report this week, intelligence officials believe Putin was directly involved in orchestrating the cyberattacks on Democrats, and one senior official told the network that it began as a "vendetta" against Clinton.

Clinton gathered major donors Thursday night in New York for a final “thank you” bash. Guests included Vogue editor Anna Wintour, producer Harvey Weinstein and designer Vera Wang, according to CNN.

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Sources in the room told CNN that she didn’t mention President-elect Donald Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE directly.

But she reportedly said the trove of hacked emails, including messages from her campaign chairman John Podesta that were published by WikiLeaks, contributed to her defeat.

Calls are mounting from both sides of the aisle and from the White House for investigations into the hacks. Other reporting on the CIA's assessment of the situation suggests that the goal was not simply to undermine the democratic process, but to tilt the election in Trump's favor.