Top U.S. intelligence official says Russia undoubtedly interfered with presidential election

Click to play video: 'Lindsey Graham wants to throw ‘rocks not pebbles’ over hacking scandal' Lindsey Graham wants to throw ‘rocks not pebbles’ over hacking scandal
U.S. Senator Lindsey Graham questioned James R. Clapper, the Director of National Intelligence, during a Senate hearing Thursday about whether President-elect Trump is prepared to throw 'rocks, not pebbles' over allegations Russia interfered in the U.S. election. – Jan 5, 2017

The United States’ top intelligence official said Thursday Russia undoubtedly interfered in America’s 2016 presidential election but stopped short of the explosive description of “an act of war,” telling lawmakers such a call isn’t within the purview of the U.S. intelligence community.

In a joint report that roiled the presidential campaign last fall, the Homeland Security Department and the intelligence community said the U.S. was confident of foreign meddling, including Russian government hacking of Democratic emails.

In its assessment, the intelligence community has said Moscow interfered in the election to help Republican Donald Trump win.

“We stand actually more resolutely on the strength of that statement than we did on the 7th of October,” James Clapper, the director of national intelligence, told the Armed Services Committee.

READ MORE: Donald Trump cites Julian Assange in casting doubt on U.S. intelligence in Russia hacking case

Pressed by Sen. John McCain, R-Ariz., on whether the actions constituted an “act of war,” Clapper said that was “a very heavy policy call” more appropriate for other entities in the government to decide.

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Clapper and other U.S. intelligence said President Barack Obama has received a report on the Russian interference and other foreign meddling in the U.S. election. They said Russia poses a major and growing threat to U.S. government, military, diplomatic and commercial operations.

WATCH: Paul Ryan defends Trump’s win against Clinton in U.S. Election; talks Russia’s meddling

Click to play video: 'Paul Ryan defends Trump’s win against Clinton in U.S. Election' Paul Ryan defends Trump’s win against Clinton in U.S. Election
Paul Ryan defends Trump’s win against Clinton in U.S. Election – Jan 5, 2017

Clapper said lawmakers will be briefed on the Russian hacking report next week and an unclassified version is tentatively scheduled to be released shortly after that.

Clapper declined to discuss Russia’s meddling beyond earlier statements. But he said Russia’s hacking “did not change any vote tallies.”

McCain of Arizona, the Republican chairman of the committee, said “every American should be alarmed” by Russia’s meddling in the 2016 presidential election. There is “no escaping the fact that this committee meets today for the first time in this new Congress in the aftermath of an unprecedented attack on our democracy,” McCain said.

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READ MORE: Donald Trump warns ‘no computer is safe’

The hearing comes a day before the president-elect receives a briefing by the CIA and FBI directors – along with the head of national intelligence – on the investigation into Russia’s alleged hacking efforts.

Trump has criticized their findings and even seemed to back WikiLeaks founder Julian Assange’s contention that Russia did not provide him with hacked Democratic emails.

In new tweets early Thursday, Trump backed away from his apparent embrace of Assange. Trump blamed the “dishonest media” for portraying him as agreeing with Assange, whose organization has been under criminal investigation for its role in classified information leaks.

“The media lies to make it look like I am against ‘Intelligence’ when in fact I am a big fan!” Trump wrote.

Clapper told the committee Assange has no credibility.

The committee’s session is the first in a series aimed at investigating purported Russian cyberattacks against U.S. interests and developing defences sturdy enough to blunt future intrusions.

Appearing before the committee were Clapper; Marcel Lettre, the undersecretary of defence for intelligence; and Adm. Michael Rogers, National Security Agency chief and the top officer at the U.S. Cyber Command.

WATCH: NSA head says ‘no one silver bullet’ will solve hacking threats

Click to play video: 'NSA head says ‘no one silver bullet’ will solve hacking threats' NSA head says ‘no one silver bullet’ will solve hacking threats
NSA head says ‘no one silver bullet’ will solve hacking threats – Jan 5, 2017

President Barack Obama struck back at Moscow in late December with penalties aimed at Russia’s leading spy agencies, the GRU and FSB, that the U.S. said were involved. The GRU is Russia’s military intelligence agency. The FSB is the main successor to the Soviet-era KGB.

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READ MORE: Obama orders sanctions against Russia over US election hacking, expels 35 diplomats

But Trump easily could rescind the sanctions. So far, he has publicly refused to accept the conclusion that Russia is responsible for the attacks. Trump this week escalated his criticism of U.S. intelligence professionals, such as Clapper, by tweeting, without evidence, that an upcoming briefing on the suspected Russian hacking had been delayed until Friday, and said, “perhaps more time needed to build a case. Very strange!”

WATCH: Russia expanding intelligence network into Cuba, Nicaragua experts warn

Click to play video: 'Russia expanding intelligence network into Cuba, Nicaragua experts warn' Russia expanding intelligence network into Cuba, Nicaragua experts warn
Russia expanding intelligence network into Cuba, Nicaragua experts warn – Jan 5, 2017

Intelligence officials said there had been no delay.

Trump suggested Wednesday in a tweet that one of Russia’s primary targets, the Democratic National Committee, could be to blame for being “so careless.”

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The penalties imposed by Obama came after he pledged a “proportional” response to the hacking of the Democratic Party and presidential nominee Hillary Clinton’s campaign chairman. Emails stolen during the campaign were released in the final weeks by WikiLeaks.

CIA Director John Brennan said in a Dec. 16 message to employees that the FBI agreed with the agency’s conclusion that Russia’s goal was to support Trump in the election. Brennan wrote that he also had spoken with Clapper and said “there is strong consensus among us on the scope, nature, and intent of Russian interference in our presidential election.”

Moscow has denied the hacking allegations and dismissed Obama’s sanctions as an attempt to “harm Russian-American ties.” Although Russian President Vladimir Putin rebuked the Obama administration for trying to punish Russia, he said his country would not immediately retaliate and would instead wait for a new U.S. approach after Trump takes office.

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