Former Vice President Joe Biden Joe BidenBiden leads Trump by 36 points nationally among Latinos: poll GOP set to release controversial Biden report Can Donald Trump maintain new momentum until this November? MORE declined Tuesday to say if he thinks Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) could unite the Democratic Party should he become the 2020 nominee.

“We have to unite,” Biden told reporters in Muscatine, Iowa. “I’m not going make judgments now. I just think that it depends upon how we treat one another between now and the time we have a nominee.”

Joe Biden to @mikememoli on whether the Democratic Party could unite behind Sen. Bernie Sanders should he win the nomination:



"I'm not going to make judgments now...But I think, I think yes. I think we can unite. We have to unite." pic.twitter.com/NWIZw8q9gK — NBC News (@NBCNews) January 29, 2020

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Biden has promised to support Democrats’ ultimate White House nominee, maintaining on the campaign trail he would “work like hell” to help any of his primary rivals oust President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE.

Sen. Tom Carper Thomas (Tom) Richard CarperDemocrat asks for probe of EPA's use of politically appointed lawyers Overnight Energy: Study links coronavirus mortality to air pollution exposure | Low-income, minority households pay more for utilities: report OVERNIGHT ENERGY: Democrats push resolution to battle climate change, sluggish economy and racial injustice | Senators reach compromise on greenhouse gas amendment stalling energy bill | Trump courts Florida voters with offshore drilling moratorium MORE (D-Del.), a top Biden supporter, echoed the former vice president’s remark.

“I think at the end of the day, people are not just looking for someone who can unite our party, but someone who can unite our country,” he told The Hill. “I know Joe Biden can do it. I'm not sure who else can.”

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However, he and Sanders have been entangled in a weekslong feud over Social Security, interventions in the Middle East, trade and more.

Biden, a moderate, has repeatedly argued that a centrist is most likely to defeat Trump in a handful of crucial swing states in November while Sanders has maintained that a progressive is best suited to energize the Democratic base and ramp up turnout.

The feud has only escalated in the leadup to the Iowa caucuses set to take place Monday. Polls show Biden and Sanders running neck-and-neck in the Hawkeye State with Sen. Elizabeth Warren Elizabeth WarrenGOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (D-Mass.) and former South Bend, Ind. Mayor Pete Buttigieg Pete ButtigiegBipartisan praise pours in after Ginsburg's death Bogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq MORE within striking distance.

Al Weaver contributed to this report