Chants of "lock her up" erupted at the Conservative Political Action Conference (CPAC) on Thursday after a speaker mentioned former Democratic presidential nominee Hillary ClintonHillary Diane Rodham ClintonTrump may continue to campaign after Election Day if results are not finalized: report Hillicon Valley: Biden campaign slams Facebook after thousands of ads blocked | Majority of voters in three swing states saw ads on social media questioning election validity: poll | Harris more often the target of online misinformation Analysis: Where the swing states stand in Trump-Biden battle MORE.

"She's already in a jail of her own making somewhere in the woods in upstate New York," conservative commentator Ben Shapiro said in response to the chants.

The "lock her up" chant was frequently heard at President TrumpDonald John TrumpStephen Miller: Trump to further crackdown on illegal immigration if he wins US records 97,000 new COVID-19 cases, shattering daily record Biden leads Trump by 8 points nationally: poll MORE's rallies throughout the 2016 presidential campaign and became something of a rallying cry for some of his supporters.

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Trump's former national security adviser Michael Flynn, then serving as a surrogate for the GOP candidate's campaign, joined the crowd at the Republican National Convention in 2016 calling to "lock her up."

"Lock her up, that’s right,” Flynn said. “If I did a tenth of what she did, I would be in jail today." 

The chants have also taken place at rallies that Trump has held since becoming president.

Trump memorably told a crowd at a campaign rally last year that they’d have to “speak to [Attorney General] Jeff SessionsJefferson (Jeff) Beauregard SessionsGOP former US attorneys back Biden, say Trump 'threat to rule of law' Biden fact checks Trump on 545 families separated at border, calls policy 'criminal' Harris walks fine line on Barrett as election nears MORE” after the crowd chanted “lock her up” in response to a reference to Clinton. 

During the 2016 campaign, Trump called for a special prosecutor to investigate Clinton's use of a private email server when she served as secretary of State, telling her during a debate that she "would be in jail" if he was president.