Watch: Former DHS chief Jeh Johnson testifies on Russian interference, election security

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Former Department of Homeland Security Secretary Jeh Johnson testified Wednesday on Russian interference in the 2016 election and U.S. electoral security.

He appeared before the House Intelligence Committee as part of its probe into Moscow's efforts to influence last year's election.

Johnson said that he believes Russian government-backed cyberattacks did not affect the actual vote tally or ballots. He added that he does not know how much the hacks of the Democratic National Committee and alleged Russian efforts to spread misinformation affected public opinion leading up to the election.

He encouraged Congress to adopt a number of possible measures to better protect election systems in the future.

Read more: Jeh Johnson: Russia did not alter vote tallies, but US 'can and should do' more to protect elections


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