Russia carried out a comprehensive cyber campaign to sabotage the U.S. presidential election, an operation that was ordered by Russian President Vladi­mir Putin and ultimately sought to help elect Donald Trump, U.S. intelligence agencies concluded in a remarkably blunt assessment released Friday.

The campaign initially sought to undermine public faith in the U.S. democratic process, “denigrate” Democratic presidential candidate Hillary Clinton and damage her expected presidency. But in time, Russia “developed a clear preference for President-elect Trump” and repeatedly sought to artificially boost his election chances.

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