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Sanders aide paints Biden as establishment candidate

A senior campaign adviser for the Sanders campaign said Wednesday that Vice President Joe BidenJoe BidenObama: Ensuring democracy 'continues to work effectively' keeps me 'up at night' New Jersey landlords prohibited from asking potential tenants about criminal records Overnight Defense: Pentagon pulling some air defense assets from Middle East | Dems introduce resolution apologizing to LGBT community for discrimination | White House denies pausing military aid package to Ukraine MORE's performance on Super Tuesday was due to the Democratic establishment rallying behind him.

"The establishment consolidated around one person," Chuck Rocha told Hill.TV. He said Biden got momentum from former South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegHigh-speed rail getting last minute push in Congress Buttigieg: Bipartisan deal on infrastructure 'strongly preferred' OVERNIGHT ENERGY: Biden ends infrastructure talks with key Republican | Colonial Pipeline CEO grilled over ransomware attack | Texas gov signs bills to improve power grid after winter storm MORE and Sen. Amy KlobucharAmy KlobucharDemocrats scramble to unify before election bill brawl Hillicon Valley: Big Tech critic Lina Khan named chair of the FTC | Lawmakers urge Biden to be tough on cyber during summit with Putin | TSA working on additional security regulations following Colonial Pipeline hack Big Tech critic Lina Khan named chair of the FTC MORE (D-Minn.) dropping their White House bids shortly before Super Tuesday.

"Those voters who were with Pete, those voters who were with Amy...there's no way to gauge that kind of consolidation within 48 hours of an election," Rocha added.

Buttigieg and Klobuchar both endorsed Biden before the polls opened on Tuesday, giving him a much-needed boost with moderate voters.

Coming off a decisive victory in Saturday's South Carolina primary, Biden carried that momentum into Super Tuesday, winning the majority of the 14 state contests and notching a few upsets in states like Massachusetts and Minnesota.

Biden was leading Sanders in the delegate count as of 2:20 p.m. ET on Wednesday.

Rocha said that with Super Tuesday data in hand, the Sanders campaign will be able to respond accordingly.

Idaho, Michigan, Mississippi, Missouri, North Dakota and Washington state all have their primaries on Tuesday.