CNN
Now playing
00:50
Clapper: 'No doubt' Russia was behind meddling
Pharmacy student Jason Rodriguez prepares Pfizer vaccines at the Christine E. Lynn Rehabilitation Center in Miami, Florida on April 15, 2021. - Jackson Health System launched a Covid-19 vaccination initiative with colleges and universities in Miami-Dade County, which include Barry University, Florida International University, Florida Memorial University, Miami Dade College and University of Miami. Through this partnership, students who are Florida residents, as well as out-of-state and international students, will be allowed to sign up for a COVID vaccine appointment via our online portal. (Photo by CHANDAN KHANNA / AFP) (Photo by CHANDAN KHANNA/AFP via Getty Images)
CHANDAN KHANNA/AFP via Getty Images
Pharmacy student Jason Rodriguez prepares Pfizer vaccines at the Christine E. Lynn Rehabilitation Center in Miami, Florida on April 15, 2021. - Jackson Health System launched a Covid-19 vaccination initiative with colleges and universities in Miami-Dade County, which include Barry University, Florida International University, Florida Memorial University, Miami Dade College and University of Miami. Through this partnership, students who are Florida residents, as well as out-of-state and international students, will be allowed to sign up for a COVID vaccine appointment via our online portal. (Photo by CHANDAN KHANNA / AFP) (Photo by CHANDAN KHANNA/AFP via Getty Images)
Now playing
01:55
Covid-19 vaccine demand may soon reach a tipping point
Now playing
04:03
Taliban threatens to kill Afghans who worked for US during war
Sen. Lisa Murkowski (R-AK) speaks to reporters as she arrives for the continuation of the Senate impeachment trial of President Donald Trump at the U.S. Capitol on January 29, 2020 in Washington, DC. The next phase of the trial, in which senators will be allowed to ask written questions, will extend into tomorrow. (Photo by Mario Tama/Getty Images)
Mario Tama/Getty Images
Sen. Lisa Murkowski (R-AK) speaks to reporters as she arrives for the continuation of the Senate impeachment trial of President Donald Trump at the U.S. Capitol on January 29, 2020 in Washington, DC. The next phase of the trial, in which senators will be allowed to ask written questions, will extend into tomorrow. (Photo by Mario Tama/Getty Images)
Now playing
04:08
Murkowski explains why she's voting for Biden nominee
pool
Now playing
04:20
Watch as judge reads out verdict in Chauvin trial
News 12 Long Island
Now playing
02:45
1 dead and 2 wounded in shooting at Long Island Stop & Shop
CNN
Now playing
01:33
Gupta on Covid-19: It doesn't seem to transmit well on surfaces
Now playing
05:01
'Did I strike a nerve?': Val Demings takes on Jim Jordan
NBC/Today Show
Now playing
02:27
'To a certain extent, nativist': Bush criticizes current GOP
NASA/JPL
Now playing
01:29
Watch the Ingenuity helicopter's first flight on Mars
AirTag
Apple
AirTag
Now playing
01:17
See AirTag, Apple's new device for tracking your lost stuff
Scene video following a crash involving a Tesla Saturday night in Spring, TX
Scott Engle
Scene video following a crash involving a Tesla Saturday night in Spring, TX
Now playing
01:09
Fatal Tesla crash had no one in the driver's seat, police say
alexey navalny russia health vladimir putin Kiley pkg intl ldn vpx_00012003.png
alexey navalny russia health vladimir putin Kiley pkg intl ldn vpx_00012003.png
Now playing
03:06
Navalny ally warns he is in dire health. Here's how he got here
DOGE COIN
Getty Images
DOGE COIN
Now playing
03:24
Dogecoin's value has skyrocketed this year
Fox News/CNN
Now playing
04:07
'Mean girl group chat': Keilar reacts to Trump's interview with Sean Hannity
Reuters
Now playing
02:14
Military spokesman announces transitional president in Chad
WCCO
Now playing
01:27
Shots fired at Minnesota National Guard and police team

Story highlights

"There's been a long history of Soviet interference going back to the Soviet era in our elections," Clapper said

He said it was unclear if "this interference actually affected the outcome of the election"

(CNN) —  

Former Director of National Intelligence James Clapper said there has never been a case of election interference more aggressive than that involving Russia and the 2016 presidential election.

“There’s been a long history of Soviet interference going back to the Soviet era in our elections, but never, ever has there been a case of the aggressiveness and direct actions that the Russians took and their conduct of a multifaceted campaign to interfere with our election,” he told CNN’s Chris Cuomo Tuesday on “New Day.”

Clapper previously testified before a Senate judiciary subcommittee that he was not aware of any evidence demonstrating collusion between President Donald Trump’s campaign and Russia – but he also said he had been unaware of an FBI investigation into the matter until former FBI Director James Comey announced it publicly at a House hearing in March.

“Are you 100% sure that Russia was behind the election meddling that you described,” Cuomo asked Clapper Tuesday.

“Absolutely,” Clapper responded. “The evidence, which unfortunately we could not detail in our intelligence community assessment, was, in my view, overwhelming. And that is why the assessment that we did enjoyed such a high confidence level.”

On the question of whether Russia’s meddling impacted the final results of the election, Clapper said, “we could not make a call whether or not this interference actually affected the outcome of the election. We did not see any evidence of voter tallying, that is the mechanical process of counting votes in any of the 50 states.”

“But we had neither the authority, the expertise, nor the capability to assess whether or not this interference actually affected the outcome of the election,” Clapper added.