Russia carried out a comprehensive cybercampaign to upend the U.S. presidential election, an operation that was ordered by Russian President Vladi­mir Putin and “aspired to help” elect Donald Trump by discrediting his Democratic rival, Hillary Clinton, U.S. intelligence agencies concluded in a report released Friday.

The report depicts Russian interference as unprecedented in scale, saying that Moscow’s assault represented “a significant escalation in directness, level of activity, and scope of effort” beyond previous election-related espionage.

The campaign was ordered by Putin himself and initially sought primarily to undermine public faith in the U.S. democratic process, “denigrate Secretary Clinton” and harm her electoral prospects. But as the campaign proceeded, Russia “developed a clear preference for President-elect Trump” and repeatedly sought to elevate him by “discrediting Secretary Clinton and publicly contrasting her unfavorably to him.”

The document represents an extraordinarily direct and detailed account of a long-standing U.S. adversary’s multi-pronged intervention in a fundamental pillar of American democracy.

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Featured image courtesy of the AP.