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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 BidenTrump rages against '60 Minutes' for interview with Krebs Cornyn spox: Neera Tanden has 'no chance' of being confirmed as Biden's OMB pick Five things to know about Georgia's Senate runoffs 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 Buttigieg'Biff is president': Michael J. Fox says Trump has played on 'every worst instinct in mankind' Buttigieg: Denying Biden intelligence briefings is about protecting Trump's 'ego' Biden's win is not a policy mandate — he should govern accordingly MORE and Sen. Amy KlobucharAmy KlobucharHillicon Valley: YouTube suspends OANN amid lawmaker pressure | Dems probe Facebook, Twitter over Georgia runoff | FCC reaffirms ZTE's national security risk Democrats urge YouTube to remove election misinformation, step up efforts ahead of Georgia runoff YouTube temporarily suspends OANN account after spreading coronavirus misinformation 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.