Federal Bureau of Investigation chief agrees with Central Intelligence Agency on Russia's alleged election help for Trump

This particular concern around Russian hacking is part of a broader set of concerns about how the U.S. deals with cyber issues being used in ways that can affect the infrastructure, affect the stability of financial systems, and affect the integrity of institutions like election process, Obama said.

"And in fact, we did not see further tampering of the election process", he added.

US counterstrikes would come "in a thoughtful, methodical way" and would be felt by the Russians, Obama said.

"Some of it we will do in a way that they know, but not everybody will", he said.

"There are still a whole range of assessments taking place among the agencies", Obama told Inskeep.

Obama said hundreds of words about the election hacking revelations some Democrats are still desperately hoping will prevent Donald Trump from attaining the presidency - and almost all of them were about what Obama saw as systemic failures by the press, the Republican Party, and the public.

"There is strong consensus among us on the scope, nature, and intent of Russian interference in our presidential election", Brennan said.

The message was confirmed by a US official after it was first reported by the Washington Post.

A group of electors had requested information about Russia's meddling in the election, which was carried out through a series of data breaches and the release of emails and documents embarrassing to Democratic Party organizations.

Both officials spoke on condition of anonymity because the investigation was continuing and portions of it are classified. However, he stopped short of blaming the hacking for Democrat Hillary Clinton's stunning loss to Trump.

"Putin publicly blamed me for the outpouring of outrage by his own people, and that is the direct line between what he said back then and what he did in this election", Clinton said. A congressional official denied Nunes was briefed, however.

Ahead of the news conference, Obama vowed that the US would retaliate "at a time and place of our own choosing" but the public might not know the extent of the response, echoing comments he made before Election Day. But, he warned, much of it would have to remain secret. "I am finding it a little curious that everybody is suddenly acting surprised that this looked like it was disadvantaging Hillary Clinton, because you guys wrote about it every day, every single leak about every little juicy tidbit of political gossip, including John Podesta's risotto recipe", he said.

President-elect Donald Trump has repeatedly questioned claims of Russian involvement in the hacks, saying in an interview last week, "It could be Russia".

Slapping sanctions on Putin's inner circle would put Trump, the 70-year-old Republican president-in-waiting, in a hard position once in office: repealing the sanctions would spark accusations of being too cozy with Moscow, a stated policy shift that has alarmed some in his own Republican Party. Obama blamed Russian Federation anew for standing in the way of global efforts to stop the civil war in Syria, where government forces have beaten back rebels in their stronghold of Aleppo.

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