DETROIT — A bitter brawl erupted during the second night of Democratic presidential debates on Wednesday as nearly half of the party’s candidates unleashed attacks on one another’s political records and policy proposals.



Going into the debate, much of the focus was on another potential clash between former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE and Sen. Kamala Harris Kamala HarrisHundreds of lawyers from nation's oldest African American sorority join effort to fight voter suppression Biden picks up endorsement from progressive climate group 350 Action 3 reasons why Biden is misreading the politics of court packing MORE (D-Calif.), two of the field’s top-tier candidates who butted heads in the first round of debates last month.



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Instead, almost all of the 10 candidates went on the attack, turning weeks of pent-up frustration and simmering tensions on members of their own party.Still, it was Biden, the contest’s current front-runner, who emerged as the top target of the night, taking heat from several of his rivals, including Sen.(D-N.J.), who grilled him over his record on criminal justice and the U.S. prison system.“The vice president has said since the 1970s, every crime bill, major and minor, has had his name on it,” Booker said. “The house was set on fire and you claimed responsibility for those laws, and you can’t just come out with a plan to put out that fire.”Biden countered with a challenge to Booker’s own record, raising issues that bedeviled the Newark, N.J., Police Department during the now-senator’s tenure as mayor. That drew a testy response from Booker, who said he welcomed a conversation about the candidate’s records.“Mr. Vice President, there's a saying in my community: You're dipping into the Kool-Aid and you don't even know the flavor,” Booker said.The tone of the debate turned confrontational almost immediately after Harris was asked about Biden’s criticism of her position on "Medicare for All" and what he has called her “every-which-way approach” to health care policy.

Harris dismissed the remarks, saying that the former vice president’s campaign was “probably confused because they haven’t read” her proposal.



“This is the single most important issue facing the public and to be very blunt and to be very straightforward, you can’t beat Trump with double talk on this plan,” Biden shot back.



As the debate raged on, the candidates touched off a sort-of circular firing squad.



Julián Castro, the former Housing and Urban Development secretary, sparred with Biden over whether illegal border crossings should be decriminalized; Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) tore into Harris’s record as district attorney of San Francisco and California attorney general; and New York City Mayor Bill de Blasio Bill de BlasioOVERNIGHT ENERGY: California seeks to sell only electric cars by 2035 | EPA threatens to close New York City office after Trump threats to 'anarchist' cities | House energy package sparks criticism from left and right EPA threatens to close New York City office after Trump threats to 'anarchist' cities New Year's Eve in Times Square to be largely virtual amid pandemic MORE pressed Biden over deportations carried out under former President Obama.



“You want to be president of the United States, you need to be able to answer the tough questions,” de Blasio said. “I guarantee you, if you’re debating Donald Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, he’s not going to let you off the hook.”



For several underdog candidates, the Wednesday debate, the second of two featuring 10 candidates each, was an opportunity to spur their fundraising and poll numbers by taking on the primary contest’s top-tier candidates, Biden and Harris.



Seven of the candidates on stage Wednesday night have not yet met the steeper requirements to qualify for the third and fourth set of primary debates in September and October, and Harris’s successful confrontation with Biden last month proved that attacking the front-runner could give a campaign a shot of much-needed momentum.



Harris, meanwhile, appeared eager to extend her feud with Biden, conscious of the boost to her poll standings that her last confrontation with him delivered. When Gabbard criticized Harris’s health care proposal, the California senator addressed the remarks only briefly before shifting her attention to Biden.



“I’m going to go back to Vice President Biden,” she said.



Biden was likewise eager to prove that he could keep pace with Harris after a lackluster performance in their first debate in June. And though he was tongue-tied at times, he landed several attacks on Harris.



While the Tuesday night debate showcased divisions in the Democratic primary field along ideological lines — it pitted the contest’s two leading progressives, Sens. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) and Elizabeth Warren Elizabeth WarrenHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Democratic senators ask inspector general to investigate IRS use of location tracking service MORE (D-Mass.), against a group of moderates — the Wednesday night showdown focused far more on political records and personality.



Some candidates appeared frustrated with the divisions on display on Wednesday. Booker, at one point, said that the intraparty dispute over Medicare for All was playing into Trump’s hands by drawing focus away from the president's own efforts to limit health care access.



“Let me just say that the person that’s enjoying this debate most right now is Donald Trump, as we pit Democrats against each other, while he is working right now to take away Americans’ health care,” Booker said.