US President Barack Obama has requested a review of all cyber attacks that took place during the 2016 election cycle, the White House has said, amid allegations of Russian interference.
"The president has directed the intelligence community to conduct a full review of what happened during the 2016 election process," said Lisa Monaco, Mr Obama's Homeland Security Adviser.
Ms Monaco said at a breakfast hosted by The Christian Science Monitor that it was vital to "understand what this means, what has happened and to impart some lessons learned".
She added that Mr Obama expected a report before leaving office on 20 January.
"The president has directed the intelligence community to conduct a full review of what happened during the 2016 election process ... and to capture lessons learned from that and toreport to a range of stakeholders, to include the Congress," she said during an event hosted by the Christian Science Monitor.
White House spokesman Eric Schultz said the review would be a "deep dive" that would look for a pattern of such behaviour over several years, as far back as the 2008 presidential election. He noted that Mr Obama wanted the review completed under his watch.
"This is a major priority for the president of the United States," Mr Schultz said.
Russian officials have denied all accusations of interference in the US election.
The move comes after Democrats in Congress pressed the White House to reveal details, to Congress or to the public, of Russian hacking and disinformation in the election.
Confidential emails from the Democratic National Committee and John Podesta, a top adviser to Democratic nominee Hillary Clinton, were steadily leaked out via WikiLeaks in the months before the election, damaging Mrs Clinton's ultimately losing White House effort.
The US Department of Homeland Security and the Office of the Director of National Intelligence said in a statement on 7 October, one month before the election, that "the Russian Government directed the recent compromises of emails from US persons and institutions, including from US political organisations."
"These thefts and disclosures are intended to interfere with the US election process," they said.
But in an interview published with Time magazine for its 'Person of the Year' award, Mr Trump dismissed the findings of the country's leading intelligence services.
Asked whether the intelligence was politicised, Mr Trump answered: "I think so."
"I don't believe they interfered. That became a laughing point, not a talking point, a laughing point. Any time I do something, they say 'oh, Russia interfered.'"
"It could be Russia. And it could be China. And it could be some guy in his home in New Jersey."
