Sen. Tim KaineTimothy (Tim) Michael KaineHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Democrats call for declassifying election threats after briefing by Trump officials Buttigieg stands in as Pence for Harris's debate practice MORE (D-Va.) on Sunday defended running mate Hillary ClintonHillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE after the FBI released a detailed report on its investigation into her use of a private email server while secretary of State, saying it proves her transparency. 

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"The reason these materials are being made public is that Hillary Clinton said, 'I want the public to see them,' " Kaine said on ABC's "This Week." 

"It demonstrates in very significant detail why the FBI chose not to go forward with any additional proceeding." 

Kaine said the report also proves Clinton, the Democratic presidential nominee, is transparent, unlike Republican nominee Donald TrumpDonald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE.

"Donald Trump ... won't even allow the American public to see his tax returns," Kaine said.