GOP senator: Did Clinton email setup play a role in Russian invasions?
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Senate Homeland Security and Governmental Affairs Committee Chairman Ron JohnsonRonald (Ron) Harold JohnsonSunday shows preview: Coronavirus dominates as White House continues to push vaccination effort Overnight Health Care: WHO-backed Covax gets a boost from Moderna Vaccine hesitancy among lawmakers slows return to normalcy on Capitol Hill MORE (R-Wis.) said Sunday that Democratic presidential front-runner Hillary ClintonHillary Diane Rodham ClintonMcConnell: Taliban could take over Afghanistan by 'the end of the year' Hillary Clinton: There must be a 'global reckoning' with disinformation Pelosi's archbishop calls for Communion to be withheld from public figures supporting abortion rights MORE's use of a private email server while secretary of State could have played a role in Russia's invasion of Crimea and eastern Ukraine. 

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"You have to assume that our enemy and adversaries had to have had access to every email that ever went over her private server," Johnson said on CBS's "Face the Nation." 

"Did it affect their actions — as it's related to, for example, [Russian President] Vladimir Putin's invasion of Crimea or eastern Ukraine? What about the negotiations with Iran? What about Assad?" 

Johnson, who has shied away from formally endorsing presumptive GOP nominee Donald TrumpDonald TrumpThe Memo: The Obamas unbound, on race Iran says onus is on US to rejoin nuclear deal on third anniversary of withdrawal Assaults on Roe v Wade increasing MORE, has been a vocal critic of Clinton. 

Republican criticism of Clinton has escalated during the past week after a watchdog report showed she didn't comply with the State Department's record-keeping policies and used a personal server without permission while secretary of State.