Republican leaders in Congress, however, "balked" at the suggestion.
"In 2016 the Russian government, at the direction of Vladimir Putin himself, orchestrated cyberattacks on our nation for the objective of influencing our election". He's urging lawmakers to grapple with the problem and to shield a pillar of American democracy.
That is correct, the DHS acting deputy undersecretary responded.
He later said he would "go along" with Russian Federation, but thought it also could have been China. "Yes, absolutely they've conducted influence operations in the past, what made this different in many regards is of course the degree and what you can do through electronic systems today", Priestap said. As a result, some 122 local election offices received phishing emails. Mark Warner (D-Va.), who said he has written to the Homeland Security Secretary, urging DHS "to disclose publicly which states were targeted".
United States officials have maintained, including during Congressional hearings on Wednesday, that no voter information was manipulated in the breaches.
Johnson said he was not aware of any information beyond what's been reported publicly and what the US intelligence community has gathered.
Johnson was asked by Republican South Carolina Rep. Trey Gowdy whether he had seen evidence of collusion or coordination between Trump and associates and Russian Federation while he was still in office.
Mueller took over the Russian Federation probe in May after Trump fired Comey.
Johnson said he was disappointed the DNC would not accept Homeland Security's help in finding its cyber-vulnerabilities.
Johnson, who served in the post until January, says he became aware of the compromise "sometime in 2016".
"For election cybersecurity, our department - in coordination with the Federal Bureau of Investigation and others - is leading the partnerships with the states and locals", said Manfra with Homeland Security.
But he says the answer wasn't reassuring. I would raise awareness among state election officials as well as, you know, public in general, employees of state governments, raise awareness about the evils and the hazards of spear phishing.
In his testimony, Johnson said the DNC shrugged off the help. When Donald Trump doesn't want to face reality, he calls facts conspiracies or hoaxes.
"We did not have any attempts to access our system", said Bryan Dean, spokesman for the Oklahoma State Election Board.
"In one case, investigators found there had been a manipulation of voter data in a county database but the alterations were discovered and rectified", sources told the magazine. Trump's Homeland Security secretary, John Kelly, announced shortly thereafter that his department would keep the "critical" label.