Michigan Rep. Rashida Tlaib Rashida Harbi TlaibGeorge Conway: 'Trump is like a practical joke that got out of hand' Pelosi endorses Kennedy in Massachusetts Senate primary challenge The Democratic Party platform represents our big tent MORE (D) booed former Secretary of State Hillary Clinton Hillary Diane Rodham ClintonBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Virginia Democrat blasts Trump's 'appalling' remark about COVID-19 deaths in 'blue states' The Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally MORE during a live campaign event for presidential candidate Sen. Bernie Sanders Bernie SandersSenate Republicans signal openness to working with Biden Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Schumer, Sanders call for Senate panel to address election security MORE (I-Vt.) in Iowa on Friday.

The moment happened toward the end of a panel discussion with Tlaib and Reps. Ilhan Omar Ilhan OmarDemocrats scramble on COVID-19 relief amid division, Trump surprise Larry Kudlow defends response to coronavirus: Trump 'led wisely' The Hill's Morning Report - Sponsored by National Industries for the Blind - Woodward book revelations rock Washington MORE (D-Minn) and Pramila Jayapal Pramila JayapalProgressive Caucus co-chair: Whistleblower complaint raises questions about 'entire detention system' Buttigieg, former officials added to Biden's transition team A Biden-Harris presidency would largely end oil and gas production MORE (D-Wash.) at Sanders's first "Caucus Concert," which featured a performance by Bon Iver in Clive, Iowa, ahead of Monday's caucus.

All three lawmakers have endorsed Sanders in the 2020 Democratic presidential primary and have spent time campaigning for him. During Friday night's event, the lawmakers mostly spent the time on stage discussing a number of progressive issues, including climate change.

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At the end of their discussion, activist Dionna Langford, who was serving as moderator, mentioned Clinton recently saying "nobody likes [Sanders]," eliciting boos from the audience.

Langford sought to quell the booing, saying: "We're not gonna boo, we're not gonna boo. We're classy here."

That was when Tlaib jumped in, laughingly saying: "I'll boo. Boo."

"You all know I can't be quiet," Tlaib added. "The haters will shut up on Monday when we win."

Rashida Tlaib booing Hillary Clinton pic.twitter.com/Wj6bIDfhy3 — Ibrahim (@ibrahimpols) February 1, 2020

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The moment comes as underlying tensions from 2016 appear to be bubbling up in the 2020 election. Sanders supporters have fiercely defended their candidate after a new interview from Clinton criticizing her former opponent.

In an interview with The Hollywood Reporter published last week, Clinton said she stood by past comments of Sanders, saying: "Nobody likes him, nobody wants to work with him, he got nothing done."

She also in the interview refused to confirm whether she would endorse or campaign for Sanders should he win the Democratic nomination this year.

Clinton again hit Sanders on Friday, saying he did not do enough to unify the party behind her White House bid in 2016.

Since launching his campaign, Sanders has continued to poll as a top-tier candidate. Recent polls show him with strong support in both Iowa and New Hampshire in the lead up to the caucuses and primary in the two states.