Democratic presidential candidate Bernie SandersBernie SandersHickenlooper day-old Senate bid faces pushback from progressives Steyer calls on DNC to expand polling criteria for debates Andrew Yang: News coverage of Trump a 'microcosm' of issues facing country MORE is still not jumping on rival Hillary ClintonHillary Diane Rodham ClintonTrump takes aim at media after 'hereby' ordering US businesses out of China Trump knocks news of CNN hiring ex-FBI official McCabe Taylor Swift says Trump is 'gaslighting the American public' MORE's controversial private email server scandal, but said a recent report condemning her actions is something voters and superdelegates will have to take into account.

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"Now, you're right — the inspector general just came out with a report; it was not a good report for Secretary Clinton. That is something that the American people, Democrats and delegates are going to have to take a hard look at," Sanders said in an interview on CBS News's "Face the Nation" Sunday. "But for me right now, I continue to focus on how we can rebuild a disappearing middle class, deal with poverty, guarantee healthcare to all of our people as a right."

A State Department report released last week said Clinton broke department rules when she set up a private email server during her tenure as secretary of State, and the system would not have been approved if she had sought permission before setting it up. 

"Well, John, they will be keeping it in mind," Sanders told host John Dickerson when asked about the effects of the report. "I don't have to tell them that. I mean everybody in America is keeping it in mind, and certainly the superdelegates are."

Sanders is still pleading his case to superdelegates from states where he performed well in primary contests, many of whom have already pledged their support to Clinton.

"The point that I'm going to make to the superdelegates, many of whom again came on board before I was in the race, came on board Clinton's campaign is, 'Your job is to make sure Donald TrumpDonald John TrumpDavid Axelrod after Ginsburg cancer treatment: Supreme Court vacancy could 'tear this country apart' EU says it will 'respond in kind' if US slaps tariffs on France Ginsburg again leaves Supreme Court with an uncertain future MORE is defeated and defeated badly. You have got to determine, based on 100 different factors, which candidate is the strongest candidate to defeat Trump.' If you look at every poll done in the last six weeks, that candidate is Bernie Sanders," Sanders said.

Sanders, unlike presumptive GOP presidential nominee Donald Trump, has not taken the bait on the Clinton email debacle. He said from the beginning of the primary cycle that people are "sick and tired of hearing about your damn emails," but as the nomination process comes down to the wire and investigations conclude, Sanders may consider using the scandal against her.