If Hillary Clinton wins the Democratic nomination for president, she'd better not pick a moderate running mate — at least according to her opponent.
"If Hillary Clinton were to bring on board a conservative or moderate-type Democrat, I think politically, that would be a disaster," Democratic presidential candidate Bernie Sanders said.
Vermont Sen. Bernie Sanders told The Young Turks news show Friday that Clinton would need to choose a running mate who isn't from Wall Street and has a "track record of standing up for working families" if she wins the nomination.
Click through images of Hillary Clinton's potential running mates:
Hillary Clinton potential running mates, VPs
Bernie Sanders says Hillary Clinton shouldn't choose a moderate VP
The junior Democratic Senator from the swing state of Virginia could be a strategic selection for Hillary. Kaine also served as the governor of Virginia from 2006- 2010.
(Photo by Samuel Corum/Anadolu Agency/Getty Images)
The current U.S. Senator from Massachusetts is popular among progressive Democrats, and some even tried to draft her to run for president herself in 2016.
(Photo by Andrew Harrer/Bloomberg via Getty Images)
Insiders believe that the senior U.S. Senator from Ohio could help Clinton increase her popularity with working-class voters, a group she has yet to win in a big way so far in primary contests.
(Photo By Bill Clark/CQ Roll Call)
The U.S. Senator from New Jersey is both youthful and charismatic and would add racial diversity to a Clinton ticket.
(Photo by KK Ottesen for The Washington Post via Getty Images)
The current U.S. Secretary of Labor is considered a sleeper pick by many Democrats because he is not well known outside of D.C., but some believe his strength and popularity among union workers and other progressive groups could be an asset to Clinton's ticket.
(Photo By Tom Williams/CQ Roll Call)
The Independent from Vermont has become Hillary Clinton's primary rival for the Democratic nomination, garnering a surprising amount of support. Bringing Sanders onto the ticket could help to unite both sets of supporters who have been split in Democratic primaries.
(Photo by Ralph Freso/Getty Images)
A former 2016 rival of Hillary Clinton, and former Maryland governor, Martin O’Malley could help bring some executive experience, along with a slight youthful boost to the ticket.
(Photo by Joe Raedle/Getty Images)
The Secretary of Agriculture since 2009, Tom Vilsack also served as the governor of Iowa from 1999 to 2007. Vilsack could bring some governing experience along with swing state influence.
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Evan Bayh could bring a more right leaning brand of politics to the ticket. Bayh previously served as the junior U.S. Senator from Indiana from 1999 to 2011, and also as the 46th Governor of Indiana from 1989 to 1997.
While the likelihood of him agreeing to take on the veep job again might be low, Biden's popularity among Democrats would likely boost Clinton's chances.
(Photo credit MANDEL NGAN/AFP/Getty Images)
Hillary's husband is technically allowed to serve in the job, and some legal experts even think he'd be able to take office if necessary. Unfortunately for the diehard Clinton supporters, a Clinton-Clinton ticket will probably be a dream that never comes true.
(Photo By Bill Clark/CQ Roll Call)
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"I will be the nominee for my party, Chris. That is already done, in effect. There is no way I won't be," Clinton told CNN last week.
"There were 400 superdelegates who announced their support for Secretary Clinton before anyone else was in the race, before the first ballot was cast, and I think that's just patently absurd and undemocratic," Sanders said.
Even if Clinton becomes the Democratic nominee, she's got her work cut out for her, especially in wooing Sanders' supporters.